The United States and Britain have insisted they will not pull out of Iraq, despite ongoing attacks on their troops. Meanwhile, a U.S. soldier wounded in one of two ambushes near Baghdad Tuesday died overnight from his wounds, the U.S. military said. A delegation of nine U.S. senators on a three-day tour of Iraq expressed confidence Tuesday in the U.S. mission, but acknowledged that risks remain. "This coalition of armed forces is never, ever going to give in, irrespective of what is thrown at it," said John Warner, R-Va., chairman of the Senate Armed Services Committee. "It will never give in until **freedom*** replaces the tyranny of Saddam Hussein and his regime." Sen. Carl Levin, the ranking Democrat on the Armed Services Committee, urged the U.S. government to reach out to other nations to help rebuild Iraq, and called on his countrymen to stay committed to the process. "We need the patience to stay the course," said Levin, a Democrat from Michigan. In Baghdad, the top U.S. official in Iraq, L. Paul Bremer, said the U.S.-led provisional authority was "well on track to establish an Iraqi interim administration by mid-July." The United States has pledged to set up a political council of 25 to 30 Iraqis that will appoint heads of ministries and be consulted on major decisions taken by the occupation government. Bremer also said the U.S.-led authority has asked airlines to submit applications to resume commercial service to Baghdad. "Day by day, conditions in Iraq continue to improve," said Bremer. "Freedom becomes more and more entrenched and the dark days of the Baathist regime are further and further back in people's memories." **Occupation Troops have Become Quicker to Pull their Triggers*** In western Baghdad, U.S. troops shot and killed two people at a checkpoint Tuesday, witnesses said. A U.S. military spokesman said he had heard about the incident but could not confirm it. Later, two civilians were shot and killed at another checkpoint, one by soldiers who feared he was an insurgent and another by a stray bullet, witnesses said. Anger at the U.S. troops was on display in Fallujah, a restive town 35 miles west of Baghdad, where an explosion at a mosque killed at least 10 people. Locals said U.S. warplanes bombed a cinderblock building in the mosque's courtyard. U.S. military officials denied bombing the site, and said the blast was likely caused by explosives stored in the building. Thousands of Iraqis chanted angry slogans as they buried the dead: "America is the enemy of God! Avenge the killings!" A USA Today/CNN/Gallup poll found the percentage of Americans who said things were going well for U.S. forces in Iraq dropped to 56 percent from 70 percent a month ago. That was down from 86 percent during the week of May 7. Bush said, on May 1 that major combat was over. **PHOTO CAPTION*** US soldiers take out the body of an Iraqi civilian after they killed him at a traffic checkpoint in Baghdad, Iraq, Tuesday July 1, 2003. (AP Photo/Saurabh Das)