Soldiers working with the Iraqi Police during Operation Iraqi Freedom capture the moment incoming mortar rounds start working their way directly onto their positions.

If you've ever been in the open during a mortar attack, then you know what these guys are feeling. Mortars, Chinese rockets, and other forms of indirect fire were common-place throughout Operation Iraq Freedom, because they were munitions that members of AQI and other insurgent groups in Iraq could easily access and use against coalition troops.

Between these indirect fire attacks, which were random and usually put the insurgents at little to no risk, and the also random emplacement of improvised explosive devices, your biggest fears in Iraq weren't being shot at by the enemy. Your biggest fears were having a random explosion take you out while there was no enemy anywhere in sight.