Yes, I considered that might be what the poster meant, and shied away from the possibility that he really meant 20 megatons, which means a thermonuclear warhead like those designed to take out entire Soviet cities. The idea that an H-bomb is more reasonable than having special forces, "boots on the ground," take out Osama is absurd. Even a megaton weapon requires targeting, which can only be achieved by "boots on the ground" anyway. We couldn't even locate the terrorist strongholds in Iraq until our large ground forces stabilized things enough that the populace dared to squeal on the terrorists, allowing them to be targeted.