advin05 posted a photo:

U.S. Army StaffSgt. Silverthorn assigned to 4th Battalion 9 Infantry Regiment explainins parts of a helicopter to his soldiers at Nasar Wasalam, Iraq 20 DEC 2009. Soldiers brief each other before an air assault training with their unit. (U.S. Army photo by Spc. Advin Illa-Medina/Not Realesed)