Worst mass shootings in recent history

13 of 22: People lay flowers at the site of Thursday's stunning shooting in Baku's Oil Academy, Friday, May 1, 2009. A young man armed with an autoamtic pistol and clips of ammunition rampaged through a pretigious institute in the Azerbaijani capital Thursday, killing 12 people and wounding others before killing himself as police closed in, the government said. Little is known about the gunman and even less about the motive for the bloodshed that shook the faculty and students of the Azerbaijan State Oil Academy, a noted school whose graduates have included future presidents and tycoons.(AP Photo/Aydin Mamedov) (AP Photo/ Aydin Mamedov)

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