William Dave Sanders was a 47-year-old computer and business teacher and coach at Columbine High School in Littleton, Colorado. On April 20, 1999, when gunfire erupted, Sanders ran to the crowded cafeteria, warned students to get down, and helped guide many to safety. Those actions are credited with saving countless lives.

As students evacuated, Sanders was shot from behind by one of the assailants. He managed to reach a science classroom where he and students and another teacher took refuge. The students tried to save him, applying pressure to his wounds; they placed a sign in the window reading 1 BLEEDING TO DEATH to attract help.

The shooters were identified as senior students Eric Harris, 18, and Dylan Klebold, 17, who died by their own hands in the library after killing 12 students and Sanders. Two other men, Mark Manes and Philip Duran, were later arrested and convicted for supplying a handgun to the underage shooters. Does anyone have memories of Sanders or information about his actions that day?