The USAF is kicking around 'creative concepts' under which it could re-engine its fleet of 74 ever evolving B-52H Stratofortresses. With the bombers remaining in front-line service until at least 2040, and considering that flying with eight 1960s vintage TF33 engines is far from fuel efficient (burning 3k gallons an hour), re-engined B-52s should make great financial sense.
Link
Link
