[arsenal]

Very good read.
http://www.spectator.org/dsp_article.asp?art_id=12233

On this morning, that mission was to establish a defensive perimeter around a block in central Samarra, so that Charlie Company's 3rd ("Blue") Platoon, led by Lieutenant Scott Young, could search a shop where it had information that Improvised Explosive Devices (IEDs) were being manufactured.

Due to the insurgents' penchant for placing IEDs along the routes used by Charlie Company's vehicles in order to ambush them on their way back, two separate rooftop observation points (OPs) would be established, one to the north and one to the south of the shop, to watch for enemy activity on the roads that were serving as Blue Platoon's infiltration and exfiltration routes. The southern OP, led by Staff Sergeant Jason Wheeler, was manned with paratroopers from Charlie Company's 1st ("Red") Platoon. "Reaper Two," one of the sniper teams from 2nd Battalion's scout platoon, would man the second OP, almost a kilometer to the north. Reaper would be overwatching the area from the roof of a large four-story apartment building, which was laid out with the long axis facing north-south, and which was bordered -- across the surrounding streets and alleys -- by several other buildings.