Harris and Klebold wrote some about how they would carry out the massacre, and less about why. Klebold penned a rough outline of plans to follow on April 20, and another slightly different one in a journal found in Harris's bedroom. In one entry on his computer, Harris referenced the Oklahoma City bombing, and they mentioned their wish to outdo it by causing the most deaths in US history. They also mentioned how they would like to leave a lasting impression on the world with this kind of violence.