While searching for vintage pipes in a junk shop I found a box of Playboy mags dating from the late 1960’s in the original FPO jackets addressed to a engineer serving on the US ship Kitty Hawk during operation rolling thunder off the coast of Vietnam. My older brother now deceased served in the same engine room at the time. He often related the extreme conditions of the constant roar of the jet planes from the deck. I wonder if they knew each other.