Calling in an air strike works first time and every time.
But doesn't that mess up the waterproofing on a tent fly?
And doesn't it depend at least a bit on munitions are used.
- Napalm has the highest reliability
- B-52 ArcLight is also highly reliable
- cluster munitions/multiple 5" rockets are pretty sure bet
- a single 500lb bomb, the results depend a lot on the target environment
- MOAB not very reliable as a source of lasting fire
- New Small Diameter Bomb - not enough data to determine reliability
- Eric