As this report notes, the last "major" bombing in Baghdad occurred last Monday -- a whole week. "Truck bombing kills 12 in Baghdad," by Selcan Hacaoglu for the [1] AP, August 3:

BAGHDAD — A truck bomb exploded during rush hour Sunday on a busy commercial street in northern Baghdad, killing at least 12 people and wounding about two dozen, Iraqi police and health officials said.

The explosives-packed small truck blew up some 200 yards away from a passport office in a Sunni Arab district, a police officer said. He spoke on condition of anonymity because he was not authorized to speak to the media.

At least two women were among the dead, the officer said. The wounded included four women and three policemen, he added. Health authorities confirmed the casualties.

It was the first major bombing in Baghdad since last Monday, when [2] three suicide bombers killed more than 30 people and wounded hundreds during a Shiite religious procession.