You are looking at 45 surplus M117 750lb general purpose bombs being dropped out of the weapons bay of a B-52H Stratofortress in under two seconds. You can see the impacts seconds later on the island far below.
Last March I asked a B-52 pilot how accurate using the B-52's radar to deliver dumb bombs is in a day and age of precision guided munitions. The pilot's response:
"Freakishly accurate. If you need a building destroyed use a PGM (precision guided munition), if you need the sprawling industrial complexes around it gone too, a B-52 laden with dumb bombs is your guy."
Tyler Rogoway is a defense journalist and photographer who maintains the website Foxtrot Alpha for Jalopnik.com You can reach Tyler with story ideas or direct comments regarding this or any other defense topic via the email address Tyler@Jalopnik.com