As I recall, the Oklahoma University seismograph registered explosions at the Murrah Building a full ten seconds prior to McVeigh’s truck going off.
There could have been shaped charges on the columns of the buildings.
Some survivors said that they went under their desks when they felt the building rumble. A short time later was the explosion from McVeigh’s truck.
The truck held an unshaped charge that was not UNDER the building, but out side the building on the street.
The resultant blast went off in all directions. The buildings across the street did not collapse but had their windows blown out. The truck bomb did some damage, but it would not have brought down half the building, which was reinforced concrete in construction, that is, unless the truck was UNDER the building in the garage.
Funny how NO building security camera footage from any of the downtown buildings that morning was ever shown.
The deflection was immediate as to the cause of the bombing. Within the day, Rush Limbaugh and right wingers were blamed.
The truth is there were ex-Iraqi soldiers in Elohim City that were involved. John Doe #2 from Tim’s truck became a legend by the second day.
A lot of people who questioned the government’s position, well, shall we say, died in untimely ways.
Someday we will know the truth. But as an engineer, I never believed that the truck brought down the building. The blast would never have severed interior colums as cleanly as that unfocussed, unshaped mass of fertilizer did.
Bill Clinton's "Reichstag Fire."