Dave CullenDave Cullen is the author of New York Times Bestseller Columbine. Cullen has also written for New York Times, BuzzFeed, Vanity Fair, Politico Magazine, Times of London, New Republic, Newsweek, Guardian, Washington Post, Daily Best, Slate, Salon, The Millions, Lapham's Quarterly, and NPR's On The Media. Read More Read Less