The American airforce subsequently traded the high-explosive bombs carried by its B-29s for incendiaries.

ECONOMIST: Japanese history

Mr. JOEL KAPLAN (White House Office of Management and Business): We will provide additional funding for new resources to protect our troops against roadside bombs and makeshift, improvised explosive devices that have been a major source of casualties.

NPR: Bush Promotes Competitiveness Initiative

No matter how you slice and dice the numbers that are out there, whether you include, clearly sectarian car bombs and IED - improvised explosive devices - no matter what it is, it has come down by about two-thirds since December last year.

NPR: Petraeus Faces 'Complex' Demands in Iraq