In a gallant attempt to spare civillians, the US & Brits decided to use concrete filled "practice" bombs.
Travelling at Mach 1.4, the kinetic energy contained has large damage potential to standard structures..
The TV shot I saw today when they killed ol "Chemical Ali,
the thing barely threw up 20-30' of dirt !
Here's a little online info I found;
U.S. warplanes have been dropping bombs filled with concrete, rather than explosives, on targets in Iraq.
The bombs, which weigh between 2,000 and 3,000 pounds, are still capable of damaging or destroying the targets they hit. But without explosives, the bombs don't generate fragments
BASRA, Iraq, April 7, 2003
(CBS) Ali Hassan al-Majid, one of the most brutal members of President Saddam Hussein's inner circle, was apparently killed by an airstrike on his house in Basra, British officials said Monday.
"He has a very brutal reputation there, and his demise is a great propaganda victory for the British forces who have now been seen with complete liberation of Basra," author Con Coughlin told The Early Show.
He had been dubbed "Chemical Ali" by opponents for ordering a 1988 poison gas attack that killed thousands of Kurds.
March 16, 1988, poison gas strike on the village of Halabja, where an estimated 5,000 people died.
During April 1991 peace talks in Baghdad, the Kurdish delegation leader, Jalal Talabani, told al-Majid that more than 200,000 Kurds died [in Basra]....
http://www.cbsnews.com/stories/2003/...in548099.shtml http://www.strategypage.com/fyeo/qnd...sp?target=Iraq
Concrete bombs used in Afghanastan too
http://www.globalsecurity.org/org/ne...3-attack02.htm 
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