an american mall. invofl voluming one of the most popular items. we begin tonight with chilling new details ableout the young couple that turned into killers. tonight, aweuthorityies have discovered photos of a high school he visited more than once. and the central question all along, what brought the two together? you're about to hear what they discussed online before she came to america. brian ross and his team on the trail again tonight. >> reporter: tonight, authorities say they are investigating whether this high school in san bernardino county and its 2,400 students were to be the next target of the terror couple. photos of the complex have now been discovered on syed farook's these forms it is a place he came to at least twice as a health inspector. >> we're working very, very hard to understand did they have other plans, either for that day or earlier. >> reporter: tonight the fbi says even before farook brought pakistani-born tashfeen malik back to the united states in the summer of 2014, even before they started dating, they were already committed terrorists. >> and online, as early as the end of 2013, they were talking to each other about jihad and martyrdom, before they became engaged and then married and lived together in the united states. >> reporter: which also means that whatever u.s. background checks were done for malik's so-called fiance visa, they allowed into the country. >> the united states does not do the kind of background check information for people applying for a visa as a bride or fiance. >> reporter: an examination of malik's photos shows her evolution. scarf and make-up at the start of college, to a more and more conservative dress. malik's facebook account has been taken down, but abc news was able to recover posts from the profile page of an account authorities believe was hers, showing a picture of a goat and a screen name in urdu. meaning a girl with no name. in august, 2014, she wrote, "woe to coconut muslims," a derisive term for one considered brown on the outside, white on the inside. the fbi director said today his agents are investigating whether terrorist matchmakers are using fiance visas to get their people into the u.s. >> do you agree with me that if it was arranged by a terrorist operative of an organization, that is a game-changer? >> it would be a very, very important thing to know. >> ryan -- brian ross with us. you've been reporting on the attack that had been planned that they didn't go through with? >> yes, the fbi has been interviewing farook's friend, enrique marquez. he claims he and farook planned an attack in 2012, but got cold feet. tonight, the fbi is trying to verify those claims and marquez's mental stability. brian, thank you. this evening, our justice team uncovering that much of their communication was encrypted. they were using apps try to bury their trail. pierre thomas, digging, and you're about to hear what he learned late today. learned they had devices with encryption on them. sources say authorities are working around the clock to decode the encryption. today, the fbi offered new details about how encryption can cripple investigations. the fbi says one of the isis sympathizers that died exchanged 109 messages with an otherseas terrorist the morning before the attack. but the messages are encrypted, and the fbi still can not uncover what was said. >> pierre, you have reported for some time that authorities were worried about this. >> yes, one official telling me this type of encryption is a the fbi from knowing whether these attacks are inspired or correctly controlled by isis. and to the firestorm involving donald trump. muhammad ali saying, speaking as someone that has never been accused of political correctness, i believe that our leaders should use their position to bring understanding about the religion of islam. tom llamas with what trump said just today when asked, is a ban on muslims unconstitutional? >> reporter: tonight, facing criticism here and abroad, donald trump now insisting his ban on muslims coming to the u.s. somehow has nothing to do with religion. >> wouldn't a ban on muslims violate the constitution's freedom of religion? in the country, the people who are outside of the country. so we're not talking about the constitution. and it's not about religion. this is about safety. this has nothing to with religion. it's about safety. >> reporter: but today president obama taking a veiled shot at trump, at an event commemorating the 150th anniversary of 13th amendment banning slavery. >> we betray the efforts of the past if we fail to push back against bigotry in all its forms. >> reporter: hillary clinton telling supporters in iowa trump traffics in prejudice and paranoia, and that the other gop candidates are one and the same. >> their language may be more veiled, less, you know, dramatic, but their ideas aren't so different. >> reporter: today trump, who loves to win, lost the title of "time"'s person of the year to german chancellor angela merkel. but "time" did release this today. >> how's my hair? >> no good. footage from their previous trump photo shoot. at one point, an eagle trying to bit his finger. >> and tom is with us live. donald trump reacting when he learned he wasn't the person of the year? >> that's right. trump saying, i told you "time" magazine would never pick me as person of the year. they picked the person that's ruining germany. david? >> tom, thank you. we're going to turn now to the anger in the city of chicago reaching a boiling point tonight. an apology from the mayor, and the pictures of the protesters in the streets, many of them now and he should resign. and the pictures kept from the public for 13 months. alex perez on the scene of the protests tonight. >> reporter: tonight, hundreds of angry protesters taking to the streets of chicago. shutting down intersections along chicago's famed michigan avenue, the magnificent mile. >> shut it down. >> shut it down. >> shut it down. >> reporter: and while the protests have been peaceful, they have been very vocal about what they want -- mayor rahm emanuel to resign. >> who got to go? >> rahm emanuel. >> reporter: the embattled mayor, under fire for weeks since the release of this video showing police shooting laquan mcdonald, who later died. video city attorneys fought to keep under wraps. >> i own it. i take responsibility for what happened because it happened on my watch. >> reporter: but just outside, critics not buying the apology. >> the political theatre surrounding around today is so disingenuous. >> reporter: the normally combative mayor, sounding emotional and humble, telling the city council about a question a young man, who has had run-ins with the law, asked him. >> "do you think the police would ever treat you the same way they treat me?" and the answer is, no. and that is wrong and that has to change in this city. >> reporter: this large crowd of protesters dissipating, but other protests are scheduled this week. the mayor says his new task force will have concrete solutions on changes that need to happen come march. and the accused gunman of appearing in court. 16 outbursts today, declaring himself a warrior for the baby babies. here's clayton sandell. >> reporter: tonight the man accused of opening fire at a colorado springs planned parenthood office, killing three people, wounding nine, in a five-hour gun battle was in court, restrained by handcuffs and leg shackles. >> protect the babies. >> reporter: but defiant. in more than a dozen outbursts, claiming to be a "warrior" fighting for the unborn. >> kill the babies. that is what planned parenthood does! >> reporter: dear is facing 179 felony counts, including first degree murder in the deaths of a police officer and two others. his public defender is the same attorney who represented aurora theater shooter james holmes at his insanity trial. >> do you know who this lawyer is? he's the lawyer for the batman me. >> reporter: the attorney suggesting that dear may not be mental competent for the trial. dear has not yet entered a plea, and prosecutors have not decided if they will seek the death penalty. and we'll turn to monster storms. a massive mudslide on u.s. 12 in washington state. neal karlinsky is in washington. >> reporter: tonight, meteorologists are calling it a fire hose coming in off the pacific. >> lord, help me get through this. >> reporter: from seattle to portland, three days of storms haven't just brought widespread flooding, but mudslides. near portland, a 60-year-old woman was killed when a tree fell on her bedroom. a series of mudslides temporarily blocked roads. one barreled through this tearing through the first floor, the garage and cars, all of it while tyler ford's grandmother was still inside. >> devastating to see everything get turned upside-down in an instant. but very thankful that everybody is alive. >> reporter: in some places, people had to be rescued by boat. >> next thing you know, it's time to get out. >> reporter: though waters have now begun to recede. not before portland smashed rain records two days straight. and seattle broke a record yesterday with 2.13 inches of rain. the power of these landslides is just incredible. not just the house that's been taken out, but there's actually a pickup truck in there and a car that's been swept into the water over there. and it's these unstable hillsides that they'll be worried about because they're so saturated, over the coming days out here. david? >> neal, thank you. and let's get to rob marciano. >> the next system is a big and and this pattern, indicative of a mature cyclone. warnings from california to colorado. the front comes from portland to san francisco, then the rain moves further inland over the next 8 to 24 hours. and there could be a severe weather threat this weekend. and now to southern california and the dangerous gas cloud hanging over a community there. many saying it's already making them sick. the gas shown there in purple. it's been six weeks and hundreds of families have now been relocated. and kayna whitworth on the lawsuit tonight. >> reporter: what looks like clear skies in this southern california community is actually a town by a giant cloud of gas. >> we have to close the windows. >> reporter: this infrared video appears to show methane gas field owned by the southern california gas company. >> they should have evacuated these people a long time ago. >> reporter: many complained of headaches, nosebleeds, and vomiting. the company saying the gas causes no long term health problems. and that residents are getting sick from a foul smelling additive they mixed with natural gases to signal a leak. at no time -- tonight, the health department insisting more tests need to be done. >> reporter: socal gas says it could take three to four months to fix this leak. residents here want the gas company fined to ensure this david? >> kay in that, thank you. still so much more ahead on "world news tonight." the warning about one of the more popular gifts this weekend. the safety investigation under way, and the new warning. and the outbreak at a popular restaurant chain, the number soaring. and could it be true? are there now several secrets hiding behind mona lisa's hint of a smile? coming up.retirement? okay, mostly prepared? could you save 1% more of your income? it doesn't sound like much, but saving an additional 1% now, could make a big difference over time. i'm going to be even better about saving. you can do it, it helps in the long run. our research shows that people really like how with directv you could put tvs anywhere and not see cable wires and boxes in every room. why can't we get people to just say cables, schmables? hold on, hold on, i really like what you're doing there because if we just add "schma" in front of something, it just doesn't seem like a big deal. boxes, schmoxes. there you go. cold sore, cold schmore. yes! scotch, schmotch! what? 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(vo) get rid of cable and upgrade to directv. call 1-800-directv. we're going to turn next to concerns about concerns about one of the hottest gifts this season. hoverboards, matt gutman getting answers. >> reporter: the flames so intense -- >> holy cow. >> reporter: it took two fire extinguishers to put it out. washington state mall. >> it just exploded. >> reporter: fire officials tell abc news the self-balancing scooter batteries overheated, and apparently it's not the first time. an alabama man saying the batteries, flew out of his. and a woman in louisiana saying the scooter she bought for her son burned the house down. >> it was like firecrackers. >> reporter: the consumer product safety commission tells abc news it's investigating incidents in at least five states. and reaching out to consumers in three others. the cpsc recommends only buying scooters imprinted with the stamp of testing firms like underwriters laboratories. the cpsc is calling this a high-priority investigation, and adds this tip. don't charge it overnight, because if there is a problem, you want to be aware of it right away. david? 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