Reply #8: not enough explosives

[RedSock]

From this somewhat ugly site (but ti should enough to get you going):
http://www.stopcovertwar.com/McVeigh.html

"According to Department of the Army and Air Force Technical Manual No. 9-1910, entitled Military Explosives, ANFO requires a greater than 99% purity of ammonium nitrate, as well as a specific dryness, before it can be mixed with diesel fuel to create an explosive substance. The manual further spells out that even under ideal conditions (not often reached even by experts) 4,800 pounds of ANFO explosive would create a much smaller crater than the one left in front of the Murrah building, and its shock wave could not possibly wield the force necessary to compromise the building’s concrete support structure. ...

"Retired Air Force Brigadier General Benton K. Partin, former commander of the Air Force Armament Technology Laboratory, a 25-year expert in the design and development of bombs, urged Senators and Congressmen to delay the destruction of the Murrah building site. Partin stated in a news release, "When I first saw the picture of the truck bomb’s asymmetrical damage to the Federal building in Oklahoma, my immediate reaction was that the pattern of damage would have been technically impossible without supplementary demolition charges at some of the reinforced concrete bases inside the building, a standard demolition technique." Partin further explained that "reinforced concrete targets in large buildings are hard targets to blast. I know of no way possible to reproduce the apparent building damage through simply a truck bomb effort."

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also i believe there were reports that morning of several additional boimbs found inside the building and removed. those reports, of course, were never broadcast again.