Over the past five years, GAO has found potential overlap or duplication in Department of Defense (DOD) weapon system investments. Overlap occurs when multiple agencies or programs are engaged in similar activities. Duplication occurs when two or more agencies or programs are engaged in the same activities. Senate Report 113-44 accompanying the FY 2014 National Defense Authorization Act mandated this report on the military services' ground radar and air-to-ground precision guided munitions programs for potential duplication. It examines the extent to which potential overlap or duplication exists across the military services' (1) ground radar and (2) air-to-ground precision guided munitions programs. Tables and figure. This is a print on demand report.