[GarySpFc]

They could hook them up to propane cans, detonate them.
I knew a fire fighter and he said one can of propane can take out a city block, no problem. The blast and then the burn.
Im sure there are other items. They may have dynamite from construction jobs.

Sorry, but your fire fighter is wrong. In the Oklahoma City explosion there were several propane containers, but that was used to propel the fertilizer mixture which created a heaving effect.

[PA-RIVER]

Were they filled with propane?