The 2005 Base Realignment and Closure Commission brought an expansion to the 138th Fighter Wing's mission. The wing acquired three F-16 Block 42 aircraft from the 57th Wing located at Nellis Air Force Base as well as six F-16 Block 42 aircraft from 132d Fighter Wing, Iowa Air National Guard. The 138th FW is also the host unit for the Defense Air Sovereignty Alert mission located at Ellington Field in Houston, Texas. BRAC also recommended the realignment of the 137th Airlift Wing, which lost its C-130 transport aircraft in 2008. Since then, as the 137th Air Refueling Wing, it shares the aircraft with the 507th Air Refueling Wing, Air Force Reserve Command, at Tinker AFB.