They describe the “BUFF” perfectly.
US Air Force’s budget will retire the B-1 and B-2 — but keep the B-52
http/us-air-forces-budget-retire-b-1-b-2-keep-the-b-52-2018-2

https://amp.businessinsider.com/us-air-forces-budget-retire-b-1-b-2-keep-the-b-52-2018-2