Airman 1st Class Barney Lopez, 28th Logistics Readiness Squadron receiving technician, verifies a package at Ellsworth Air Force Base, S.D., Sept. 1, 2015. Receiving technicians must validate and authenticate each package in order to ensure facilities on base receive the appropriate parts they need to meet mission requirements. (U.S. Air Force photo by Senior Airman Rebecca Imwalle/Released)