WASHINGTON - Montana's congressional delegation wants the U.S. Air Force to rethink a proposal to expand training airspace for B-52 and B-1 bombers stationed in the Dakotas.

The Air Force wants to triple the size of the Powder River Training Complex, which skirts parts of Montana, South Dakota and Wyoming. The changes would expand the complex into much of southwestern North Dakota and southeastern Montana.

Montana Sens. Max Baucus and Jon Tester wrote the secretary of the Air Force on Monday, saying the proposal could affect the flight patterns of medical and other small aircraft.

Montana Rep. Denny Rehberg said he also thinks the concerns of agricultural producers and rural hospitals should be addressed.

The B-52s are stationed at Minot Air Force Base in North Dakota, and the B-1s are stationed at Ellsworth Air Force Base in South Dakota.