In part one of our two-part season finale, two survivors of the 2007 Virginia Tech massacre bravely recount the emotional and disturbing events of the fateful day that transformed their lives. That morning, Kevin Sterne was in German class, and Kristina Anderson was in a nearby French class when a gunman chained the doors of Norris Hall, walked up to the second floor, and suddenly opened fire in their classrooms. Following a terrifying shooting rampage in several other classrooms, the gunman finally shot himself, ending the deadliest mass shooting in American history. Kristina lay helplessly on her classroom floor, anxiously waiting for help to arrive after being shot three times, including twice in her back. Kevin never thought he would make it out of his classroom alive after a bullet tore through his femoral artery. Both of them courageously held on in the final moments waiting to be rescued.