Yahoo:

BAGHDAD, Iraq - At least 20 American service personnel were killed in military operations Saturday in one of the deadliest days for U.S. forces since the
Iraq war began, and authorities also announced two U.S. combat deaths from the previous day. The day's worst loss came from the crash of a U.S. Army helicopter northeast of Baghdad that killed 13 service members. An attack Saturday night blamed on militiamen in the city of Karbala killed five soldiers. Roadside bombs killed another soldier in the capital and one in Nineveh province north of Baghdad.