According to this Knight-Ridder article in the San Jose Mercury News, US troops may have been involved in a slaughter every bit as disturbing as anything that happened in Viet Nam.

Iraqi police have accused U.S. troops of executing 11 people, including a 75-year-old woman and a 6-month-old infant, in the aftermath of a raid Wednesday on a house about 60 miles north of Baghdad.

This certainly isn't the first time the US has been accused of war crimes in Iraq.  Until now, most of those accussations have proven (mostly) false.  However, that makes this charge more unsettling is the nature of those making the accusation -- the US-trained Iraqi police.