The conduct of U.S. troops in Iraq, including increasing detention and accidental shootings of journalists, is preventing full coverage of the war reaching the American public, Reuters said on Wednesday. Reuters said U.S. forces were limiting the ability of independent journalists to operate. At least 66 journalists and media workers, most of them Iraqis, have been killed in the Iraq conflict since March 2003. U.S. Forces acknowledge killing three Reuters journalists. But the military say the soldiers were justified in opening fire. Reuters believes a fourth journalist working for the agency, who died in Ramadi last year, was killed by a U.S. sniper.