April 20, 1999, was one of the most tragic days in school history.  Craig Scott, a sophomore, was in the library of Columbine High School as two gunman opened fire killing Scott's sister, two friends he was with, as well as nine other students and one teacher.  Scott's sister, Rachel, was the first student to be killed.  In the days and weeks following the Columbine tragedy, the Scott family found Rachel's six diaries, poems, and other drawings, which reflected her philosophy and beliefs about life, and challenged others to show kindness to everyone.  "I have this theory that if one person can go out of their way to show compassion, then it will start a chain reaction of the same.  People will never know how far a little kindness can go," Rachel wrote in an essay a month before her death.  Rachel's Challenge grew out of the Scott family's desire to continue the work that Rachel started in her daily life.