Ambulance vehicles and emergency workers are seen in front of Domodedovo Airport in Moscow, Monday, Jan. 24, 2011. An explosion ripped through the international arrivals hall at Moscow's busiest airport on Monday, killing dozens of people and wounding scores, officials said. Russian President Dmitry Medvedev called it a terror attack. (AP Photo/Alexander Zemlianichenko)

Photo by: Alexander Zemlianichenko

Ambulance vehicles and emergency workers are seen in front of Domodedovo Airport in Moscow, Monday, Jan. 24, 2011. An explosion ripped through the international arrivals hall at Moscow's busiest airport on Monday, killing dozens of people and wounding scores, officials said. Russian President Dmitry Medvedev called it a terror attack. (AP Photo/Alexander Zemlianichenko)