BAGHDAD (Reuters) - Roadside bombs killed three civilians and wounded three American soldiers in Iraq on Saturday, while a poll said most Iraqis regarded the U.S.-led forces as occupiers rather than liberators of their country. Another U.S. soldier was wounded when guerrillas attacked a Black Hawk helicopter with rocket-propelled grenades (RPGs) near Saddam Hussein's home town of Tikrit. The latest attacks came while U.S. Deputy Defence Secretary Paul Wolfowitz, a major force behind the Iraq war, paid his second visit to Iraq in three months. He stressed the need to speed up the formation of a new Iraqi army, police...