Thanks for the link to the video
This caught my attention:
"A federal Alcohol, Tobacco and Firearms agent says the explosives are enough to destroy a small building and that a small quantity of the explosives that were taken is frequently used by engineering firms to take out steel girders."
Not that a small building isn't bad enough, but steel girders sounds worse..(bridges, power plants, etc.)
Yeah, this is a bad one. Whoever did it likely knew what they were doing and had a ready buyer for the merchandise.