Ret. Air Force weapons expert Ben Partin extensively investigated the OKC bombing and found many inconsistencies with the official story as reported by FEMA engineers.

http://physics911.net/generalpartinreport

http://www.generalpartin.org/redflags.htm

General Partin was then invited on the program Extra to present his position. The host ridiculed and belittled Partin to give the impression that Partin didn't know what he was talking about.