Columbine

School shootings have become a tragic reality of modern American life. How can school administrators prepare for the worst-case scenario?

Fears of inspiring copycats and a recent surge in "morbid fascination" visitors have prompted school officials to consider tearing down the building. The school's name and mascot would stay the same.

At least 2,600 school walkouts were planned across the country, starting at 10 a.m. in each time zone.