Sky News removed other parts of the video, to prevent copycats from learning some of the technical details. The technique struck me as similar to how the "Mythbusters" crew outfits a car for a stunt, only here the objective is mayhem and pain, not science. Car bombs, or in modern military parlance "vehicle borne improvised explosive devices," are a key part of the ISIS arsenal. Iraq observer Joel Wing wrote that in the week of December 22nd to the 28th, Iraq saw 13 car bombs, the fewest since June. Previous campaigns have used about 50 car bombs a week. While the Pentagon may still estimate ISIS's manpower at around 20-30,000 fighters, 50 drivers a week from June to December is loss of 1,200 fighters, which is a lot.