A shot in the dark.

Under the illumination of flares, Security Forces from the 185th Air Refueling Wing, Sioux City, Iowa operate the M-240 and M-249 machineguns during night fire qualification at Fort Harrison, Montana on 13 May 2009. Tracer rounds aide gunners by allowing him or her to “walk” the fire onto the pop up targets. (US photo by TSgt Brian Cox)

Pay attention or get lost.

Troops from the 185th Air Refueling Wing, Security Forces, Sioux City, Iowa listen intently as they are instructed in the finer points of land navigation during the classroom portion of a land navigation course at Fort Harrison, Montana on 13 May 2009. The land navigation course consists of classroom instruction which includes map reading, compass, and protractor familiarization. The second phase will be a practical application exercise in the field where troops will put those skills to use. (US Air Force photo by TSgt Brian Cox)

On the shotgun range

A member of the 185th Air Refueling Wing, Security Forces from Sioux City, Iowa, qualifies with the Remington shotgun at Fort Harrison, Montana, on 11 May, 2009. (U.S. Air Force photo by TSgt. Brian Cox)

Shooting the little green men

Members of the 185th Air Refueling Wing, Security Forces from Sioux City, Iowa, receive instruction on range estimation during qualification on Squad Automatic Weapon (SAW) M-249 Light Machine Gun at Fort Harrison, Montana, on 11 May, 2009. (U.S. Air Force photo by TSgt. Brian Cox)

Replacing the barrel on an M-249

A member of the 185th Air Refueling Wing, Security Forces from Sioux City, Iowa, replaces the barrel of Squad Automatic Weapon (SAW) M-249 Light Machine Gun during qualification at Fort Harrison, Montana, on 11 May, 2009. (U.S. Air Force photo by TSgt. Brian Cox)

It's not as easy as you think!

Members of the 185th Air Refueling Wing, Security Forces from Sioux City, Iowa, fire the Squad Automatic Weapon (SAW) M-249 Light Machine Gun at Fort Harrison, Montana, on 11 May, 2009. (U.S. Air Force photo by TSgt. Brian Cox)