out of the sunni triangle in the presurge 2006/2007. they had taken root in mosul. and we were trying to take that city back. >> it's the squadron's sixth straight day of around the clock combat operations, and the men are exhausted. >> we'd been up for about 36 hours at this point, and we're making our way back to our combat outpost. >> the battle worn neighborhood is known as an insurgent hot spot. >> the terrain favored the enemy immeasurably. the buildings, the bombed out buildings, were difficult to see the windows. narrow alleys leading up to those roads and those particular intersections. >> but on this day, the area's main road, a major supply route for both u.s. and iraqi forces, looks clear, and the squadron decides to take it. >> i got it before every attack, that pit in my stomach. i knew something bad was going to happen. that's why i decided to take out the camera and start filming, just based purely on hunch. >> staff sergeant jason catrel is acting as lead scout standing