As I stated in the "Disclaimer" to my section of the OKBIC Report, I concentrate on the questions of "What happened?" and "How?". Others (like Jayna Davis, the rest of OKBIC, et al) are far better equipped to address questions of "Who? and "Why?".
TXnMA (No Longer!!!)
Based on your research, was a single truck bomb responsible for the damage to the Murrah Building?