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Archives by date > 2012 > April > 19th

Big Bang, Small Space: The USA’s “Focused Lethality Munitions”

Apr 19, 2012 16:22 UTC

GBU-39 SDB Hits Truck

GBU-39: Gotcha.
(click to see results)

Boeing’s GBU-39 Small Diameter Bomb Phase I (SDB-I) is a specially shaped 250-pound bomb. Its thin and pointed shape gives it extra punch against buildings and hardened targets, its pop-out wings give it very good glide range, and its JDAM-like GPS/INS guidance kit gives it precision. Raytheon’s GBU-53 SDB-II bombs added the ability to strike moving targets.

While there have been true stories of “cement bombs” designed to lower collateral damage, “Focused Lethality Munitions” take a higher-tech tack. This Small Diameter Bomb variant changes the bomb’s casing and internal fill, in order to produce more devastating effects within a smaller area. A carbon-fiber bomb body disintegrates instead of fragmenting, which adds explosive force nearby but largely removes shrapnel issues beyond. Inside, metal particles turn the explosive material into short-range projectiles. The result is especially useful in urban areas, in situations where friendly elements are close to the impact zone, and in campaigns fought using contemporary American counter-insurgency doctrine. Publicly-announced orders have included:

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Rapid Fire April 19, 2012: Space Export Control Policy

Apr 19, 2012 09:00 UTC

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  • The Pentagon released a report [PDF] on space export control policy after it reviewed, in cooperation with the Department of State, whether satellites and their components could be taken off the United States Munitions List (USML). They found that other countries have less restrictive rules and recommend loosening US legislation as well as giving more authority to the executive branch in such decisions. “Higher fences around fewer items” is how the Administration describes its policy. Early expressions of support or opposition in Congress seemed to follow party lines. Will this eventually make life easier for Thales Alenia?

  • The Center for Strategic and Budgetary Assessments (CSBA) loves directed-energy weapons [PDF]. Cost asymmetry – imposed by or to the enemy – has a lot to with it:

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