Photos: Army designates year's best inventions

Another aerial invention of sorts in the 2007 group is the XM982 Excalibur precision-guided artillery projectile, which, the Army says, "ushered in the 21st century for cannon artillery." In this image, taken in February at Camp Blessing, Afghanistan, a member of the 321st Field Artillery Regiment programs map grid coordinates into an Excalibur round.

Photo by Sgt. Henry Selzer/U.S. Army

Caption by Jonathan Skillings