After viewing the contents of the video what is current understanding of Columbine events and why did Eric Harris and Dylan Klebold orchestrate and execute the violent attack on the school?

Students are to watch the Final Report: Columbine video. Then students are to write a 2-3page paper pertaining to the contents of video.
Students work must include:

1. A brief summary
2. What was the original personal understanding of the Columbine events (do not use I statements)
3. The questions explored in the video and the answers to each.
4. After viewing the contents of the video what is current understanding of Columbine events and why did Eric Harris and Dylan Klebold orchestrate and execute the violent attack on the school?