Rescue workers clean up the rubble of an eight-story building that exploded in Moscow on September 13, 1999. The explosion was set off on the ground floor, killing 94 people inside and injuring 150 outside the apartment. The bombing was one of several that took place in Russia between August 31 and September 22, and which were supposedly organized by Chechen separatists. Almost 300 people were killed by the bombs, triggering the start of the Second Chechen War.

CREDIT: Reuters/ Sergei Karpukhin