Stook

Awesome campaign so far, and I'm only on mission 2 where you lase the planes. Question though, I was trying to find some C4 to steal and killed everyone in the village near the airport. It then said mission completed head to extraction. Got on the heli, it flew around for a minute then stopped and hovered. Nothing happened after that. I assume its because the planes were not blown up? Can you tell me where the C4 is hidden? :p