This mission will begin where the last mission left off, so fast travel to Alpha Camp and go east to meet up with Sam. Pirates have planted some bombs on the drug fields and Sam needs some protection while he disarms them. There are a total of 3 bombs, and enemies will come from all directions. Included are Chargers with Molotovs and normal enemies for the first bomb.
Once the first is defused, follow Sam to the second bomb. When you get there, some enemies will be there, so take them out. The wave of enemies for this bomb will include just normal ones, but a truck with a machine gun will show up towards the end. There’s also a sniper in the one tower. Even if the bomb has been defused, Sam won’t move to the next one until all enemies have been killed.
Follow Sam to the third bomb site. There will be a stationary machine gunner here, as well as one other enemy when you get to the site. While Sam is defusing the bomb, there will be A LOT of enemies that come, including a Heavy Gunner. Once the bomb is defused, kill the rest of the enemies and then a helicopter shows up. Keep shooting it until it explodes, then talk to Sam to finish the mission.