A commuter injured by the blast at the Park Kultury subway station shortly after Monday's explosion. Egor Barbatunov/AP hide caption

David Greene
Police officers and investigators stand at the site of an explosion at the traffic police station on the outskirts of Makhachkala, the capital of Russia's Dagestan region on Jan. 6. A suicide bomber blew up an explosives-packed car at the police station, killing at least six officers and wounding 16, police said. AP hide caption
Abdulgamid Ashimov is the head of Sulak. He once pleaded with Russian security forces to keep their raids out of the village. David Greene/NPR hide caption
Gamblers play their cards in a poker game on Jan. 30 at the opening of the Oracle casino in a gambling zone in southern Russia, about 600 miles south of Moscow. Half a year after Russia closed all of its casinos and slot-machine halls, the first new casino opened under a plan to limit legalized gambling to four comparatively remote areas. AP hide caption
Russia's Alexander Ovechkin (8) and Andrei Markov (79) react after losing the quarterfinal game to Canada 7-3 on Wednesday. Some Russian commentators called the game a "nightmare." Matt Slocum/AP hide caption
Russians purchase vodka from a street kiosk in Moscow. Leaders are again trying to curb Russians' drinking habits by setting a minimum price for vodka. Alexander Nemenov/AFP/Getty Images hide caption
Russian retiree Leokadya Maximova, 72, of Kaliningrad says she is struggling to get by on her $265-a-month pension. She says the situation will prompt her to take to the streets with other anti-government protesters. David Greene/NPR hide caption
Presidential candidate Viktor Yanukovych greets supporters in the town of Yenakiyevo last week. The Ukrainian opposition leader faces Prime Minister Yulia Tymoshenko in the second round of presidential voting on Sunday. Andryi Mosienko/AP hide caption
Viktor Yushchenko and onetime political ally Yulia Tymoshenko sing the Ukrainian national anthem in Kiev's central Independence Square in November 2004, during protests that became known as the Orange Revolution and that led ultimately to Yushchenko's election. Gali Tibbon/AFP/Getty Images hide caption