riding along with a c 130. for the crew, flights like this one are common but never routine. for security reasons, we can only identify the crew by their ranks and first mates. >> we just main vigilance. situational awareness when there's always other things going on. everybody gets saturated. we make sure we keep focus on getting the mission done. >> the iraqi army backed by u.s. force system fighting an intense battle trying to oust isis from its largest stronghold, mosul. as the war intensifies, the troops unleash more firepower and need new ammo to come in fast. that makes cargo flights like this one so important. landing is the most dangerous part. the c 130 is vulnerable as it flies low over the iraqi country side. the crew wearing helmet and flask as they fly low over the