RE: B-52's at Guam.
I saw that while sitting on an R&R flight waiting for our turn to take off. Almost couldn't see it though, as I looked down the runway, with the amount of black smoke those puppies put out.
Not sure but I think water injection was used for extra HP on takeoff. That was the reason for the black smoke, anyway, that was the only explanation I heard while there.
Many years ago, we went over that cliff on Guam (Andersen) with a fully loaded B-29, losing number 4 engine just after rotation.
We were wave hopping for several minutes with max power on the other three and cylinder head temp on number two climbing into the red. Number two was shut down on short final.
Landing with a bomb bay load of 500 pounders is always a thrill.