Two deadly suicide bombings in southern Russia are stoking fears of a terrorist attack on the Winter Olympic Games in Sochi, which are just six weeks away.
At least 30 people were killed in the two blasts in the city of Volgograd, located just 400 miles northeast of Sochi.
An explosion Monday hit a trolleybus near a busy market during the morning rush hour.
Another blast Sunday targeted Volgograd's main train station, a transit point for people traveling by train to the site of the Winter Games.
No one has claimed responsibility for the blasts, but the leader of a Chechen separatist group has pledged violence to disrupt the Olympic Games.
Jeff Beatty, a former CIA counter-terrorism officer, is OutFront.