And, billiondollar dive. The sunken ship, buried for centuries. About to reveal one of the greatest treasures of all time. Good evening. Thanks for joining us on this very busy sunday night. Im tom llamas. We begin tonight as president obama will address the nation, as a result of this husband and wife. Launching the deadliest act of terrorism on american soil since 9 11. And this home, neighbors of one of the terrorists reporting they saw him transform right in front of him. Heres cecelia vega. Starting us off from california, where a clearer picture of the attackers is emerging tonight. Reporter tonight, investigators searching for clues in another house not too far from here. Tonight, the investigation turning to this home, and enrique marquez, his onetime friend and neighbor, suspected of providing the guns used in the massacre. The fbi raiding the home last night. Did he provide the guns to farook . Reporter Authorities Say theres no information that marquez played any role in the shooting. Leaving 14 dead. He has reportedly checked himself into a Mental Health facility. They kept to themselves. Theyre very neighborly. All their children, theyre good kids. Reporter this neighbor said she noticed a change in farook about a year ago. Whats the biggest difference . His dress, beard, more withdrawn, started wearing his white thing, the long, draped outfit, whatever it is. And so he did start changing. Reporter but nobody said they noticed any warning signs of the terror to come. I never saw them talk about guns or say anything suspicious. Reporter tonight, this new photo of farook and his family. His brother and sisterinlaw are angry for not knowing they were living a double life. Do you feel like you didnt know your brother . No, at this time, i feel like he had a double life. Life, very good at concealing everything from all of us. Reporter his father saying his son was fascinated with isis, and hated israel. And that he shared ideology with the isis leader. And his brother and sister saying theyre in complete shock. They went to his house, never saw anything suspicious. And tonight say theyre grieving for all of the people that died right here behind me. Tom . Cecilia, thank you. And tonight, the fbi is on the hunt for any links the attackers may have had to jihadi recruiters or known terror groups. However they were inspired, this plot appears to be the kind of homeground terror the fbi has long feared. Heres pierre thomas. Reporter tonight, hundreds of fbi agents here at home and across the globe are in a race against time to uncover exactly what and who was behind the massacre in San Bernardino. Fbi officials are searching computers and cell phones associated with the killer couple in a desperate attempt to see if they were radicalized or directed by isis or other terrorists. The female killer allegedly swore allegiance to the leader of isis on facebook on the day of the assault. The most important part of this investigation right now is, are they lone players, the two of them, or are they connected to other people . Reporter but if this couple was truly inspired by isis, it marks a dangerous evolution in the u. S. Terror threat. The fbi director has been warning for months about an unprecedented social Media Campaign by isis encouraging potentially thousands of followers in the u. S. To attack. Its as if there is a devil sitting on their shoulder all day saying, kill, kill, kill reporter the social Media Marketing polished, not just violent, appealing to the young. Theres evidence the Marketing Campaign is working. In the last two years alone, the fbi has identified or arrested nearly 90 suspected isis supporters from inside the united states. Average age, only 25. At least 20 teenagers. 13 females. And 15 of those arrested accused of trying to launch murderous plots here at home. The nation narrowly averted the first isisinspired massacre in may when two men armed with assault rifles tried to attack a texas cartoon conference about the prophet mohammed. And now this young suburban couple who left behind a 6monthold baby and went on a vicious killing spree. Law enforcement is struggling to cope with the new isis social media threat. Which has found a young, captive audience, that can strike without warning. Tom . Tom . And president obama will speak to the nation tonight, the topic terror, specifically homegrown terror. Coming after he and his National Security team held a weekend meeting on the San Bernardino attacks. Jonathan karl joins us now. Why is the president speaking tonight . The president knows people are on edge after the attack in San Bernardino. And the president wants to reassure people hes taking the threat seriously. Hes going to give an update on the San Bernardino attack. Making it clear this was an act of isisinspired terrorism on american soil. He will look at specifically what the government will do to deal with homegrown terrorism. And he will talk about actions he will say needs to be done on visas, guns, and other issues. But if youre looking for a wholesale change in strategy, thats not what the president will offer tonight. This is an intensification of whats already being done. Not a change in strategy. and hell be speaking from the oval office. The podium there at the ready. And theres a reason for the rare setting for the president. Correct . This is an extremely rare speech from the oval office. Hes only given two others. But his other goto venue, the grand hall in the white house is right now filled with christmas decorations, which would hardly be an appropriate background for a speech on terrorism. Thank you. And the president s address begins at 8 00 p. M. Eastern, right here on abc. And terror and isis is fueling the president ial debate. The president ial candidates talking tough. And Hillary Clinton parting ways with the white house, saying america is not winning the battle. Trump saying some american muslims should be closely monitored. And cruz rising in the polls with an aggressive position. Heres devin dwyer. Reporter tonight, Hillary Clinton says the u. S. Fight against isis is falling short. Were not winning, but its too soon to say if were doing everything we need to do. Reporter trump and clinton now in a statistical tie. Today facing off about how to fight isis and talk about the terror threat. Heres clinton on this week. Whats the problem with radical islam . The problem is, that sounds like were declaring war against a religion. Radical islamic terrorism. You look at the names, whats happened, you tell me. Reporter trump is open to racial profiling. Clinton is worried it could make the threat worse. Theyll use that as a tool to say, were at war against the west. Reporter both candidates want a more aggressive military campaign in iraq and syria. When ted cruz suggested this well carpet bomb them into oblivion. Reporter clinton says its not that easy. Its hard to decide who the bad guys are. Reporter trump saying he will agree to a ban on the nofly list. As for boots on the ground, trump said hes open to deploying american combat forces. Clinton said she would like to see more than the 50 special forces that president obama has approved. Thank you. And lets head overseas, an apparent lone wolf attacker taken down in london. Stabbing two before being brought down by police. Authorities are treating it as a terrorist incident. Jennifer eccleston reporting in from london tonight. Reporter cell phone video captures a terrifying scene. Tase him, tase him, tase him, tase him. Reporter a man with a knife lunging at police at a london subway station after allegedly stabbing two people. Its a risk. Life is a risk here. Reporter police subduing him with a taser. Both survive but tonight Scotland Yard is calling the attack a terrorist incident. Police searching a home in london tonight. Might be a self starter, just self radicalized from material on the internet. Reporter media reports say the man shouted, this is for syria. One witness on the scene shouting this youre no muslim, bro. Reporter the attack comes at time of high alert after a string of terror arrests and just days after parliament voted to launch air strikes against isis in syria. Opponents had feared that move could trigger lone wolf attacks across the homeland. Tonight, police are urging the people to remain calm but alert and vigilant. Calling the threat of terrorism here severe. Tom . Jennifer, thank you. A shooting here at home raising questions tonight. This video capturing the final moments in miami beach. A suspected bank robber facing police with a straight razor. Authorities say he made a sudden movement, and two Police Officers responded very differently. Heres marci gonzalez. Reporter tonight, investigators going frame by frame through this cell phone video and others shot by bystanders in miami beach as an attempted robbery suspect armed with a straightedge razor was shot and killed by police. I saw the guy fall down and everything. Reporter investigators havent said why one officer decided to use deadly force while another fired a stun gun. In this image you can see the filaments hitting the suspect just a moment before hes killed. A Police Officer on the street literally has a fraction of a second to make the determination whether deadly force is warranted. Reporter police identifying the suspect as a man with a record of bank robbery that had escap escaped. Officers confronted the man after he walked into a bank of america yesterday morning and allegedly handed this note to a teller demanding money claiming to have a bomb. Police say he then took off with no cash and ran into this nearby barber shop. Coming out grasping this barbers razor. Leading to the deadly confrontation. He did raise his hand with the straightedged razor in it and he was shot. Reporter investigators now going over these images, and video from at least one officers body cam. Looking into whether the shooting was justified. Marci gonzalez, abc news, new york. Next to the nations weather. The northwest, bracing for a series storms this week. Look at this wintry scene. Icy roads making travel difficult. Even closing i90 for part of the time. This week, he have heavy rain and flooding could be the story. Storm after storm battering the region. Parts of oregon and washington could see a foot of rain by wednesday night. And some good news from former president jimmy carter tonight. Four months after revealing he had brain cancer, now telling his church group hes cancerfree. The former president , now 91, was treated with surgery, radiation, and a cuttingedge antibody. Still ahead, the Great Holiday debate. Is it a holiday or Christmas Tree . Starbucks playing it safe with simple red cups. Is christmas being disguised . And later, a scare in the air for morgan freeman. Causing his private jet to make an Emergency Landing. Those stories, coming up. Whatever youre doing, plan well and enjoy life. Or, as we say at unitedhealthcare insurance company, go long. Consider an aarp Medicare SupplementInsurance Plan insured by unitedhealthcare insurance company. Go long. To prove to you that aleve is the better choice this is claira. For her shes agreed to give it up. Thats today . Well be with her all day to see how it goes. After the deliveries, i was ok. Now the ciabatta is done and the pain is starting again. More pills . Seriously . Seriously. All these stops to take more pills can be a pain. Can i get my aleve back . For my pain, i want my aleve. 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Reporter new jerseys charlene storey resigning this week after the city Council Voted to change the name of the holiday Tree Lighting ceremony to a Christmas Tree lighting ceremony. Its not a holiday tree, its not a pear tree, its a Christmas Tree. Reporter that city councilwoman later reconsidered, deciding to stay on. But all across the country, christmas controversies are lighting up like trees. From the campaign trail if i become president , were all gonna be saying Merry Christmas again. That i can tell you. Reporter to campus. Some university of tennesseeknoxville students upset with a University Memo urging inclusion, saying, ensure your Holiday Party is not a Christmas Party in disguise. Its my godgiven right to be able to have a Christmas Party. Reporter to coffee shops. Starbucks stirring ire by removing christmas symbols from their holiday cups. Yes, they got rid of the christian religious symbols like snowflakes and snowmen. Reporter still, some say there is something we can all agree on. The holidays are the holidays. We celebrate them, and its all good. Mara schiavocampo, abc news, new york. They are all good. When we come back, the College Football picks. Who will face off in the playoffs . And liftoff. Why this mission is so crucial to the crew on the International Space station. Stay with us. Chemotherapy, its not every day something this big comes along. A chance to live longer with. Opdivo, nivolumab. Opdivo is the first and only immunotherapy fda approved based on a Clinical Trial demonstrating longer life. For these patients. In fact, opdivo significantly increased the chance of living longer versus chemotherapy. Opdivo is different. It 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. 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Its the First Successful supply launch to the iss since a trio of failures over the past year. Now to a close call for Actor Morgan Freeman involving a crash landing. A tire blew on his private jet shortly after takeoff. The pilot started burning off fuel then made an Emergency Landing in mississippi. Freeman thanked his pilot, saying, quote, we landed safely without a scratch. I cannot say the same about my plane. College football now. The playoff is set and tonight, the top four teams have been announced. Number one clemson will take on the fourthranked oklahoma in the orange bowl. Number two alabama will face off number three Michigan State in the cotton bowl. Both games set for new years eve. And tonight, a moment to remember someone we lost in our abc family. Former White House Correspondent bob clark, best known for his live reporting on the assassinations of both president kennedy and robert f. Kennedy, has passed away. Bob was a contributing host to the sunday program issues and answers. Bob clark was 93. Still ahead, a deep sea mystery solved. Why the location of this sunken treasure was kept a secret for years. And why its being called the holy grail of ship wrecks. Or stop to find a bathroom . Cialis for daily use is approved to treat both erectile dysfunction and the urinary symptoms of bph, like needing to go frequently, day or night. Tell your doctor about all your medical conditions and medicines, and ask if your heart is healthy enough for sex. Do not take cialis if you take nitrates for chest pain, as it may cause an unsafe drop in blood pressure. Do not drink alcohol in excess. Side effects may include headache, upset stomach, delayed backache or muscle ache. To avoid longterm injury, get medical help right away for an erection lasting more than four hours. 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So much gold, colombias president making a claim as big as the discovery. It is one of the biggest findings and identification of underwater heritage in the history of humanity, he says. The spanish galleon, the san jose, sank on june 8th, 1708, in the caribbean off the coast of cartagena, colombia. It was 150 feet long and armed with 64 guns. Estimates of the treasure on board, believed to include emeralds, gold and coins like this one shown on the Facebook Page for sea search armada, and silver vary widely. From an astonishing 4 billion to as much as 17 billion. It is a job of many years with many people, says a member of the team. A huge triumph. Dive teams have kept the exact location of the galleon secret, for obvious reasons. It was found in 1,000 feet of water during what was very much a hightech treasure hunt. Tonight, what is thought to be one of the worlds most valuable shipwrecks is a secret no more. Neal karlinsky, abc news, los angeles. We thank neal for that story. We thank you for watching. Gma first thing in the morning, and david muir will be right back here tomorrow night. Im tom llamas in new york. For those of you celebrating, happy hanukkah. Have a happy evening, and good night. Ribeiro heres a sneak peek at tonights afv. We know youre gonna love it. Aah ohh aah man here comes sugarfoot. [ laughter ] [ cheers and applause ] welcome to americas funniest home videos and now here he is, the host of our show, Alfonso Ribeiro [ cheers and applause ]