FILE - In this May 14, 2015 photo, C-130 Hercules cargo planes are lined up at Davis-Monthan Air Force Base in Tucson, Ariz. What amounts to a huge dirt parking lot with hundreds of workers is where thousands of U.S. military aircraft go to die. Some go slowly as valuable parts are removed over time for use on other aircraft still in the air, while others will become aerial targets. Some are even put back into duty with U.S. forces. (AP Photo/Matt York)