In reply to Duncan Bourne:
Bit of a tricky one.
The MOAB is apparently a 21,000 lb bomb, equal to about 11 tonnes of TNT.
That's not far short of the 15 ton TNT equivalent dropped on Hiroshima.
Though looked at another way, a single B-52 can drop an even greater TNT equivalent than the MOAB when shooting its load of bog-standard 500lb Mk-82 iron bombs - the staple and minimum ordinance on just about any NATO aircraft. I imagine that many Mk-82s get dropped by the US in the Middle East every day.
More disturbing I found was the rather casual and jovial manner that folk talk about these sorts of weapons on youtube documentary clips (Discovery Channel "Weapons of War!" style stuff). Randy, from down at the golf club, likes to watch football on a Monday, goes to church, enjoys his Bud over the BBQ at the weekend, produces ridiculously powerful weapons able to annihilate cities or dispersed humans during his 9 to 5. Also, rather ironic that dispensed from a C-130, its kind of a rich-man's version of the barrel-bombs we don't like Assad using.
Post edited at 15:00