A US Army AH-64 Apache Attack Helicopter hovers over an airfield in Baldad, Iraq, on 3 JAN 2008. Note the chin-mounted 30mm M230 chain gun. It can produce a rate of fire of up to 625 rounds per minute. The bird can hold up to 1,200 rounds of ammunition. US Army Photo by Master Sgt. John Nimmo, Sr. Defense Imagery Operations Center.