From Wikipedia: The reaction of 1 kg of antimatter with 1 kg of matter would produce [...] the rough equivalent of 43 megatons of TNT. For comparison, Tsar Bomb, the largest nuclear weapon ever detonated, reacted an estimated yield of 50 megatons.
I dare say this would take a briefcase bomb to a whole new level.
I dare say this would take a briefcase bomb to a whole new level.
http://en.wikipedia.org/wiki/Antimatter#Fuel