The U.S. Military Working Dog Teams National Monument in Texas honors the noble four-footed soldiers who sniff out explosives, brave the battlefield, save lives and die in the line of duty. (U.S. AIR FORCE)

The U.S. Military Working Dog Teams National Monument in Texas honors the noble four-footed soldiers who sniff out explosives, brave the battlefield, save lives and die in the line of duty. (U.S. AIR FORCE)