In Iraq, Pentagon officials have concluded it was a massive bomb that killed 14 Marines on Wednesday in the western city of Haditha. The Marines were driving in a 25-ton lightly-armored amphibious troop carrier that was not designed for coming under such attacks. It was the deadliest roadside bombing since the war began. In the past two weeks, at least 31 U.S. soldiers and Marines have died in roadside bombings. According to the Knight Ridder news agency, bombs killed more coalition troops in July than in any previous month of the war. U.S. officials admitted on Wednesday that troops are now being targeted with more powerful and more effective bombs. The 14 Marines were all members of the 3rd Battalion, 25th Marines, based in Brook Park, Ohio. Six more Marines from that Batallion died on Monday.