Nightly News   |  January 19, 2014

Terror Threats to Sochi Olympics

The latest terror threat to the Olympics comes from two suicide bombers who promise that attacks will being a "surprise" to the event.

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This content comes from Closed Captioning that was broadcast along with this program.

>> good evening. we begin with an ominous new terror threat against next month's winter olympic games in sochi , russia , with thousands of athletes, journalists and spectators from the u.s. and around the world soon arriving in sochi . today, a well-known islamic militant group claimed responsibility for the twin suicide bombings that killed 34 people last month in the city of volgograd . and they vowed to stage more attacks, making specific mention of the olympics and the tourists who will come for the games. our chief foreign correspondent richard engel is in moscow with more on this latest threat. richard, good evening.

>> reporter: good evening, lester. russian officials say this country has extensive experience organizes sporting events and insists the olympics may be safe. not maybe so, but this latest threat does at least appear credible. the latest terror threat to the olympics comes from two suicide bombers who are already dead .

>> you won't see me.

>> reporter: this video is the last testimony of the calm, young men. they documented what they were about to do, step by step . how they build vests with explosives, strap them on, wires running down their arms, the trigger within easy reach. and some time later -- those men, according to the video, killed dozens of civilians at a train station in volgograd and at a pus over the new year. it was posted on a website known to be used by islamic militants . the bomber said volgograd was just the first wave. the next attacks they said, quote, will bring surprise to the olympics . president putin has promised to mobilize the army, police and intelligence service if necessary. it would be difficult to get a bomb anywhere near the olympic venues. attackers might not have to. russia is vast, with plenty of targets. but why attack during the olympics ? an ancient festival of peace. mostly revenge. russia is fighting a low-level war in the caucuses, a muslim majority territory less than 1,000 miles from sochi . the republican of dagasthan is especially violent and that's where the suicide bombers said they're from. another reason be? syria. putin supplies many of the weapons bashar al assad uses to attack muslim rebel groups. the winter olympics aren't really the target. russia is. the games, analysts say, are just an opportunity to grab attention and to try to harm vladimir putin . u.s. officials tell us they expect the olympic park itself will be secure, but worry there could be an attack somewhere else. richard?

>> richard engel in moscow. thank