[link|http://www.nytimes.com/aponline/international/AP-Iraq-Shooting.html|U.S. Troops Fire on Iraqi Protesters Again]
"U.S. troops opened fire on anti-American demonstrators for the second time this week as Iraqis marched Wednesday to protest the previous shooting. The local hospital said one person was killed and at least 16 others wounded.
...
Protesters started throwing rocks and shoes at the compound and troops opened fire about 10:30 a.m., scattering the demonstrators. Protesters then returned to pick up the wounded."
Firing at rock throwers?