US Army Rangers, 1st Battalion, 75th Ranger Regiment, participate in a Combined Arms Live Fire Exercise (CALFX) near Fort Stewart, Georgia, Jan. 11, 2012. The exercise is conducted in order to evaluate and train members on de-escalation of force, reactions to enemy contact, and other objectives that prepare them for forward operating. (US Air Force photo by Senior Airman Samuel Goodman)

[Image courtesy of the US Army Flickr Stream.]