Actually the JDAM is a kit for the tail of standard "dumb" munitions to turn them into guided weapons. There are kits for anywhere from 250 pound bombs to 2,000 pounders. That video is not from a bunker buster, as those bombs are designed from the ground up to be smart not as an afterthough, and also made to punch through the concrete first before detonation. If that was the case with this one, we'd see a lot more penetration in the soft earth that this munition strikes.
The Joint Direct Attack Munition (JDAM) GBU-31 is a tailkit under development to meet both USAF and Navy needs, with the Air Force as the lead service. The program will produce a weapon with high accuracy, all-weather, autonomous, conventional bombing capability. JDAM will upgrade the existing inventory of general purpose and penetrator unitary bombs, and a product improvement may add a terminal seeker to improve accuracy. JDAM can be launched from approximately 15 miles from the target and each is independently targeted.
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