"In addition, the Israelis evidently repeatedly used a new U.S. smart bomb, capable of penetrating three feet of steel-reinforced concrete, the bunker-busting 250-pound class GBU-39 Small Diameter Bomb. (The first group of up to 1,000 of these that the U.S. Congress authorized Israel to buy only arrived in early December.) In use as well, the one-ton Mk84 Joint Direct Attack Munition (JDAM) and a 500-pound version of the same. These are major weapons systems. Evidently dropped as well were 'Dime (dense inert metal explosive) bombs designed to produce an intense explosion in a small space. The bombs,' reported Raymond Whitaker of the British Independent, 'are packed with tungsten powder, which has the effect of shrapnel but often dissolves in human tissue, making it difficult to discover the cause of injuries.'"
- Tony Karon, 'Change Gaza Can Believe In', tomdispatch.com, 22 January 2009.