B-52 was the last USAF bomber to have a rear-ward facing guns. During the Gulf War, one of two theories that a rear-ward facing gunner turned on his defensive fire control system and was hit by friendly fire after an F4 released anti-radiation (HARM) missile in the blind. The AGM-88 locked on to the DFCS and blew off the rear section of the BUFF -- which was then nicknamed "In HARM's Way".
https://theaviationgeekclub.com/exclusive-former-buff-gunner...