Russians Study Islamic Video Threatening OlympicsIn the video, a militant Islamic group claims responsibility for the Volgograd suicide bombing that killed 34 people and threatens to strike the Winter Olympics in Sochi.
U.S. Lawmakers Demand Russia Give 'Full Story' on Olympic Safety ThreatsMembers of Congress expressed serious concerns Sunday about the safety of Americans at next month's Olympics in Russia and said Moscow needs to cooperate more on security.
Unexplained Killings In Russia Heighten Olympic Security ConcernsSix men have been found dead in four abandoned cars.
Suicide Bomber Kills At Least 15 in Russia Train Station AttackAt least 14 people were killed and scores were wounded Sunday by a female suicide bomber at a railway station in southern Russia, officials said, heightening concern about terrorism ahead of February's Olympics in the Black Sea resort of Sochi.

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