On April 20, 1999, when Columbine students Eric Harris and Dylan Klebold killed 13 – a dozen students and a teacher – there were about 259 million guns in the US. By 2007 there were 310 million.

Eric Harris (left) and Dylan Klebold, carrying a TEC-9 semi-automatic pistol, are seen in a photo made from a security camera image in the cafeteria at Columbine High School, in Littleton, Colo. AP ...

The pair, Eric Harris and Dylan Klebold, entered the school building armed with rifles, shotguns and handguns. They had also built 99 improvised explosive devices and carried four knives.

Mass shootings didn’t start at Columbine High, but the mass-shooter era did. Eric Harris and Dylan Klebold’s audacious plan and misread motives multiplied the stakes and inspired wave after ...

As one of a small circle of insiders who considered Eric Harris and Dylan Klebold to be their good friends before April 20, he's thought about that day a great deal in the last few years.

“I have forgiven you and only wish you the best,” Anne Marie Hochhalter said in an open letter to Sue Klebold, whose son committed the deadliest high school shooting in U.S. history along with ...

Dylan Klebold and Eric Harris were the trenchcoated Columbine seniors who in 1999 shot dead 13 people and injured 24 others before killing themselves, in the infamous attack that made them role ...

She addressed her own personal struggle with her son, Dylan, who along with Eric Harris murdered 13 people and wounded 21 more at their high school, making it one of the nation’s worst mass ...

By GINA LAMB &#124; Updated: April 17, 2008<br/><p>On the morning of April 20, 1999, Eric Harris, 18, and Dylan Klebold, 17, walked into Columbine High School, outside Denver, and shot to death 12 ...

Twenty years ago, on April 20, 1999, two high school seniors barraged into their high school, Columbine High, and killed 13 people. The shooters, Eric Harris and Dylan Klebold, both died by suicide.

Twenty years ago, two teenagers wearing trench coats went into Columbine High School in Littleton, Colo., with a deadly plan. On April 20, 1999, Eric Harris, 18, and Dylan Klebold, 17, randomly ...