Matter-Antimatter annihilation is a one-to-one effect and extremely powerful per atom. Do you recall the sig involving the 1kg squirrel sig somebody once had?
The way I see it, the APB is going to be putting out almost unnoticable amounts of antimatter... (unnoticable that is, until it hits something

)
Then you get a nice fireball, but
on the scale of poking holes in ships, not laying waste to the environment of a planet

.
I do not see antimatter being worth the trouble and expense for that type of job; not enough fallout, either. Better to just use a cheap 'ol dirty nuke (Radiation Bomb) and irradiate the place.
Edit: punctuation for clarity
PS: Feel free to disagree and convince me otherwise
[ February 23, 2003, 02:27: Message edited by: Suicide Junkie ]