Security a concern ahead of Winter Olympics in Sochi

Security officers search people entering a stadium before the Sochi 2014 Winter Olympic torch relay in Makhachkala, the capital of Russia's troubled southern republic of Dagestan, on January 27, 2014. Insurgents based in North Caucasus republics such as Dagestan who are seeking their own independent state have vowed to disrupt the upcoming Sochi Games in a bid to undercut President Vladimir Putin.

From October 15 through the end of 2013 there were three suicide bombings targeting transportation in Volgograd, 600 miles north of Sochi.

The 2014 Winter Olympic Games begin in less than two weeks in Sochi and lately we've been hearing a lot about security concerns.

Terrorists have threatened to attack the games and three suicide bombings in the city of Volgograd last year have led to a feeling of unease. Last week, the US State Department issued a travel alert, saying large-scale events, such as the Olympics, present "an attractive target" for terrorists.

Here's more from the alert, updated on January 24:

"Between October 15 and December 30, 2013, there were three suicide bombings targeting public transportation in the city of Volgograd (600 miles from Sochi), two of which occurred within the same 24-hour period. In early January 2014, media reports emerged about the possible presence of so-called “black widow” suicide bombers in Sochi. These reports have not been corroborated, and the U.S. government continues to seek further information."

For more, we’re joined by Representative Adam Schiff, senior member on the House Intelligence Committee.