Twenty-three others were injured, and the two shooters -- Dylan Klebold and Eric Harris -- killed themselves.

CNN: Columbine seniors graduate under the shadow of shooting

In that incident, two teenage students, Dylan Klebold and Eric Harris, armed themselves with guns and bombs and shot people inside the high school.

CNN: SHARE THIS

The profile also included a video tribute to the Columbine High School shooters, Eric Harris and Dylan Klebold, at the top of the man's favorites list.

CNN: Finnish gunman kills 10 at college

Many people have asked why the parents of Littleton gunmen Eric Harris, 18, and Dylan Klebold, 17, didn't know that their teen-agers were making homemade bombs and doing other preparations for the assault.

CNN: Town meeting looks at lessons from Littleton

Eric Varvel is the boss of Credit Suisse's investment bank, Harris Simmons heads Zions Bancorporation, a more local bank, and Allan O'Bryant runs the Japanese arm of Reinsurance Group of America.

ECONOMIST: Schumpeter