Fatal Shootings That Took Place at U.S. Schools

April 16, 2007 — -- Today's killings of at least 29 people on the campus of Virginia Tech is among the worst school shootings in U.S. history. Here's a look at some other notable attacks on U.S. campuses:

Full coverage continues on "World News With Charles Gibson," "Nightline," "Good Morning America," and an ABC network special Tuesday at 10 p.m. EDT