"Aerial refueling aircraft are key to military air operations. The U.S. tanker fleet is numerous and effective, but old. Modernizing or replacing the current fleet of tankers presents the Department of Defense (DOD) with difficult choices in terms of desired capabilities, force structure, and budget. The Air Force's proposal to lease 100 Boeing 767 aircraft to replace it's KC-135E fleet is controversial. This report will be updated."
CRS Report for Congress, RS20941