them, putting other drivers in danger. what happens when the family then attempts a citizen's arrest? good evening, and it's great to have you with us here on a busy tuesday night, and we begin with president trump late todayen leashing an attack on his own attorney general in front of cameras at the white house. a very rare and unusual attack right in the rose garden on his own pick for a.g. one of president trump's closest allies during the campaign. the president now furious after jeff sessions recused himself from the russia investigation. is the president going to fire him or is he applying extraordinary public pressure to get him to resign? a abc's chief white house correspondent, jonathan karl, leading us off. >> reporter: today in the rose garden trump refused to say whether he would fire his attorney general. >> i'm very disappointed with the attorney general but we will see what happens. time will tell. time will tell. >> reporter: the president is publically seething over jeff sessions' decision to recuse himself from the russia investigation. today he was asked why he is letting the attorney general twist in the wind. >> well, i don't think i am doing that. she should not have recused himself almost immediately after he took office, and if he was going to recuse himself, he should have told me prior to taking office, and i would have, quite simply, picked somebody else. >> reporter: it's an incredible turn of events. >> we need to make america great again. >> reporter: sessions was the first senator to endorse candidate donald trump. arguably the most important endorsement of his entire campaign. trump spoke glowingly of him even before the endorsement. >> we have a great politician here. we have a man here, who is the one person i sought his council because he's been so spot on, so highly respected, has anyone ever heard of senator jeff sessions? huh? >> reporter: sessions became the first person trump picked for his cabinet in his confirmation hearing, he reassured senators he knew an attorney general had to be independent. >> he or she must be willing to tell the president or other top officials if he or they overreach. he or she cannot be a mere rubber stamp. >> reporter: but in march when sessions announced he was recusing himself from the russia probe, white house aides say the president exploded in anger. and in may, following the announcement of special counsel robert mueller, the president exploded at sessions again. the attorney general offered his resignation, but it was not accepted. now, the president's anger is boiling over. he's called sessions "beleaguered," today tweeting sessions has taken "a very weak position on hillary clinton crimes." it's an odd attack for the president. shortly after the inauguration, he told david he hoped for an end to the clinton investigations. >> do you think america is done hearing about investigations into hillary clinton? >> i just don't know. i mean i -- i hope so. and from my standpoint, we wanna move onto the future. >> reporter: while the president tweeted about clinton this morning, today he made it clear he's still upset over the attorney general's decision to recuse himself from the russia probe. >> i think that's a bad thing, not for the president but for the presidency. >> so let's get to jon karl live at the white house tonight, and jon, what are your sources telling you? is the president close to firing the attorney general, or is he simply trying to put pressure on him to resign here? what does the president want? >> reporter: it's unclear what the president wants, but i'll tell you this. people close to the president today believed that the president was on the verge of firing sessions. one person who intervened was close clinton friend -- close trump friend and adviser, newt gingrich. he was at the white house today, and urged him not to fire sessions. of course, the firing didn't happen, but sessions -- gingrich afterwards cautioned the story is not over. >> jon karl leading us off from the white house. jon, thank you. as this was playing out at the white house t drama across town on capitol hill. an emotional return by senator john mccain after revealing the brain tumor and the president needed john mccain's vote on the newest debate on how to repeal obamacare. it was not known how he would vote or what he would say, and what he then delivered was a blistering warning to fellow senators to do their jobs. abc's mary bruce back on the hill for us tonight. >> reporter: senator john mccain today touched down in washington just in time. less than a week after being diagnosed with brain cancer, mccain swooping in to cast a critical vote on health care. his wife, cindy, by his side. a scar visible above his left eye. on the senate floor, mccain was welcomed back with a massive standing ovation. his colleagues there waiting, after seven years of promises, months of planning, it was down to the wire. with mccain's help, republicans narrowly voted to begin debate on health reform. >> mr. mccain. >> mccain cast his vote, and then he spoke his mind. for 15 minutes, he railed against the dysfunction in washington. >> let's trust each other, let's return to regular order. we're getting nothing done, my friends. we're getting nothing done! >> reporter: it was classic john mccain, holding nothing back. >> stop listening to the bombastic loudmouths on the radio and television and the internet. to hell with them. [ applause ] >> reporter: today's vote to begin debate is an important step. >> and the motion is agreed to. >> reporter: but there's still a very long way to go before republicans agree on a plan to repeal and replace obamacare. mccain made it clear that what's on the table isn't good enough. >> i will not vote for this bill as it is today. it's a shell of a bill right now. we all know that. >> reporter: he is now urging senate leaders to change their ways, for the parties to come up with a health care solution together. >> do you plan to heed his advice? >> some issues are just more partisan than others. there's a lot of things that we have done and will continue to do on a bipartisan basis. regretfully, the issue of health care has not fallen into that category on either side. >> mary bruce with us live on the hill tine, and good to see john mccain back, and on this vote, the bottom line for people at home tonight, mary. today's vote simply opens the door for a new debate now whether to repeal only at first or whether to repeal and replace obamacare together, and you said there are more questions whether they have the votes if it gets that far. >> reporter: david, now the real work begins. republicans have agreed to debate, but now they are still struggling to come up with a health care bill they can agree on, that can get enough republican votes to fulfill this promise, and what that solution looks like, tonight, it remains unclear, david. >> mary bruce on the hill for us as always. mary, thank you. we have one more developing headline out of washington. the house passing sweeping sanctions against russia for meddling in the presidential election. the bipartisan measure would make it harder for president trump to ease sanctions on russia. is sanctions target iran and north korea as well, and that heads to the senate. the summer camp tragedy outside atlanta. authorities shutting down an unlicensed day camp following the drowning death of a 5-year-old boy. his parents now issuing a warning tonight, and abc's adrienne bankert tonight from georgia. >> reporter: a mother and father's angry and heartbreaking cries for justice. >> their negligence killed my son! >> reporter: tonight, this summer camp shut down by state officials, who say the camp was operating without a license when 1-year-old benjamin hosch died in their care. >> they robbed us of his life, of his potential. >> reporter: the boy's parents last saw their child alive friday while dropping him off at camp cricket outside atlanta. police say benjamin and 12 other children were having lunch near a waterfall, then allowed to splash in the water. as they gathered to leave, the chaperones noticed benjamin was missing. his parents say he couldn't swim. >> my wife called me and said your boy's facedown, unresponsive. >> reporter: the nature center saying in a statement, the child was found a short distance away in a pool of water in an area that had not been visited by the group. the hosch's lawyer says its a sobering wake up call for camps nationwide. >> someone will pay in this. >> reporter: and david, the family tells us that they intend to sue everyone involved, and there could be criminal charges filed. david? >> adrienne, thank you. there is a new report out this evening after a deadly train collision. a mother of three was killed when she stopped on the tracks. several passengers on that commuter train were also killed. investigators now revealing what they have learned so far. here's abc's linsey davis. >> reporter: tonight the search ffr answers about this deadly crash between a metro north train and an suv. more than two years after the fiery accident, federal investigators announced today they are still unable to determine why the driver stopped on the tracks. >> i certainly don't believe that she thought she was on a railroad track. >> reporter: alen brody was on tracks and the train was unable to stop in time. the engineer honked its horn and then applied the brakes. >> the front car just exploded. people are jumping out. >> reporter: nearly 350 feet pierced right through the front car killing five passengers and brody, a mother of three also died. today investigators said the crash was extra deadly because that third rail didn't break away in a controlled manner. investigate also said the engineer was not at fault, and the warning system at the crossing worked properly. the driver's husband is suing the engineer and rail. >> the job of the signage to make sure you know where you are. >> reporter: this crossing is still operational, but there are plans to shut it down. >> linsey davis, thank you. overseas tonight and to the new confrontation between the u.s. navy and iran. this video showing firing several warning shots there, an iranian vessel in the persian gulf today. coming within 150 yards of the american patrol ship, and the pentagon says it was conducting routine operations in the region. back home and to the frightening moments in houston, a family in their car witnessing an alleged drunk driver in front of them putting drivers and pedestrians at risk. they are running red lights, nearly hitting paedestrians. what happens when that father moves in to conduct a citizens arrest? here's clayton sandell. >> he is driving fast. >> on the wrong side of the road. >> reporter: alejandro fernandez knew something was wrong. this car damaged in another crash nearly hits him. >> we decided to turn around and start following him. >> reporter: they were headed to dinner saturday, and calls 911, but stays close, following the driver into this houston parking lot. >> hey! >> reporter: trying to get away, the mustang driver backs into a truck. >> stop it! >> reporter: he is trapped. that's when fernandez moves in to take the driver out. >> stop it, man. >> reporter: police don't recommend this sort of thing, but for fernandez -- >> one of my best friends died because of a drunk driver, and i was thinking about that. >> reporter: this is that driver's third arrest for driving under the influence, and this time he is charged with a felony, david. >> clayton, thank you. now to the american company sparking a fierce debate across the country tonight. a business in wisconsin implanting microchips in its employees, in the skin of their hands. so what are they tracking and would you say yes if your boss asked you to do the same? here's abc's chief business correspondent, rebecca jarvis. >> reporter: tonight, science fiction about to come to life at wisconsin vending company three square market. what did the employees say when you brought this idea to them? >> half of them actually within five seconds says, yes. >> reporter: ceo todd westby along with 50 employees implanting microchips, the size of a grain of rice, between their forefingers and thumbs. allowing them to do everything from unlocking doors at work, to to even pay for snacks in the break room with a swipe of a hand. there are some reservations. >> there's always the fear of infection. so it's the unknown right now. >> reporter: doctors telling us, as with any procedure there are potential risks. another concern? employee privacy. what did it take to persuade the holdouts? >> we had to explain to them there is no tracking of the information. it's not gps or anything like that. >> reporter: participation is optional, and many of the employees here say they are more curious than nervous. >> i think it's kind of cool. just pop it up there and it will work. >> our chief business and exhibition correspondent with us now. analysts are saying this is not just the wisconsin company, but a debate about the future and where this could go from here. >> industry experts forecast we could see these chips used by hospitals to store our medical records, even at airports to store that passport information, and that is just the beginning, david. >> right in our hands. >> right in our hands. >> i think i'll pass. >> i think so. in the future. there is much more i a head on "world news tonight." thank you, rebecca. after the bride-to-be was shot dead after calling 911, what we have now learned in that case. we have the frightening chain reaction crash. a lowe's truck runs a red light flipping over into the intersection. and the passengers who witness a flight between a pilot and a flight attendant today, and then what happened. and then the baby orca tragedy tonight. the final baby orca born in captivity now dying tonight. a lot more news ahead. they've been putting these everywhere. hey, aren't you the guy that use- used to ask if you could you hear me now? 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>> absolutely. >> reporter: the park making those changes after the 2013 documentary, "blackfish," criticized the park -- focusing on the trainer who was killed in front of a horrified crowd. kyara is the last orca to be bred in captivity after the park stopped its breeding practices. the park says she had pneumonia, but they will determine the cause of death. when we come back, that frightening chain reaction crash after a lowe's truck runs a red light and veers into that intersection. and then this. ♪ a passing to report tonight. frank sinatra's long time wife is being remembered. ll lung can, previously treated with platinum-based chemotherapy, a passing to report tonight. frank sinatra's long time wife is being remembered. here's a question: who wouldn't want a chance for another...? who'd say no to a...? who wouldn't want... a chance to live longer. opdivo (nivolumab). opdivo demonstrated longer life versus chemotherapy. over 40,000 of these patients have been prescribed opdivo. opdivo works with your immune system. opdivo can cause your immune system to attack normal organs and tissues in your body and affect how they work. this may happen any time during or after treatment has ended, and may become serious and lead to death. see your doctor right away if you experience new or worsening cough; chest pain; shortness of breath; diarrhea; severe stomach pain or tenderness; severe nausea or vomiting; extreme fatigue; constipation; excessive thirst or urine; swollen ankles; loss of appetite; rash; itching; headache; confusion; hallucinations; muscle or joint pain; flushing; fever; or weakness, as this may keep these problems from becoming more serious. these are not all the possible side effects of opdivo. tell your doctor about all your medical conditions, including immune system problems, or if you've had an organ transplant, or lung, breathing, or liver problems. because who wouldn't want...that? 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give up my 2 aleve for 6 tylenol? no thanks. for me... it's aleve. to the index of other news tonight, and a development into the officer-involved shooting to of a bride-to-be in minneapolis. a newly obtained search warrant reveals the police report saying the woman approached the back of the police car, and slapped the vehicle before justine damond was shot by an officer. it's unclear if she was the woman they were talking about in that report. the chain reaction crash involving a lowe's truck in missouri. it blasted through the intersection, and there were no serious injuries. it is under investigation. an airline apologizing after a pilot and flight attendant delaying the flight. scheduled from new york's laguardia airport to portland, maine, held up with that pilot and flight attendant began trading insults in the middle of the aisle. the two were replaced, and the plane left two hours later. it's under investigation. there is a stunning report linking football and brain injury. the research from boston university looking at the brains of 202 deceased football players, and 80% showed cte of the former pros. 110 out of 111 of them met the criteria for the disease. this only includes brains that were volunteered for that study. and a passing to note tonight. barbara snu tra. widow of the late singer, frank sinatra. known as lady blue yois, she was married to frank sinatra until hid death, and she was 90 years old. when we come back here tonight, america strong. the little dog pulled from a fire saved by a firefighter's oxygen mask. where that tiny mask came from, we did not know until tonight. you have got to see this. the ford summer sales event is in full swing. they are not listening to me. watch this. who wants ice creeaaaaaam!? 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[ cheers and applause ] thank you, johnny. thank you, ladies and gentlemen. somehow, justin, our champion, finds a way to win the game. he could be in the red for a while, but then he starts coming back. he falters a bit and then he builds it up. and at the end, he is triumphant. will that happen again today with catherine and mackenzie?