WHY?

Virginia Tech students pay their respects in front of a makeshift memorial after a candlelight vigil for the 33 people who died the day before in two shooting incidents on campus in Blacksburg, Virginia, April 17, 2007. The shooting is the deadliest on a school campus in U.S. history. (UPI Photo/Saul Loeb)

Source: http://www.upi.com/