2 January edition of the Christian Science Monitor - Relentless Toll to U.S. Troops of Roadside Bombs by Brad Knickerbocker.

... Of the 3,000 American GIs lost in Iraq as of midday Sunday, more have been killed by roadside bombs - improvised explosive devices (IEDs) - than any other cause. More than by rifle fire, mortar attack, or car bomb.

It's a danger that has bedeviled Pentagon war planners for months, one to which they've responded with a high-level task force headed by a retired four-star general, $6.7 billion in research and development, new high-tech equipment and vehicles, and - perhaps most important - intelligence efforts to get inside the decisionmaking of an insurgency that is sophisticated, if largely low-tech.

If anything, the danger is increasing despite efforts to counter it.

IEDs are "the enemy's most effective weapon," Army Gen. John Abizaid, commander of all US forces in the Middle East, told the Senate Armed Services committee last March. "They are the perfect asymmetric weapon - cheap, effective, and anonymous."

Improvised bomb attacks on US troops now top 1,000 a month, four times the rate in 2004. Insurgents have become more sophisticated in their bombmaking, placement, and means of detonation. The British military has determined that there are enough stocks of illegal explosives to continue the same level of attack for years without resupply, reports DefenseNews.com...