Defense Secretary Robert Gates said the success of the mission, which was starting well, could not be measured for months and that it was designed to give the Iraqis more time to settle political and sectarian differences. “The issue that we’re all trying to figure out is how best do you get the Iraqis to reconcile their differences – because after all, this is not going to be solved by the military. It has to involve political reconciliation in Iraq, among Iraqis,” Gates said on CBS’s “Face the Nation.” “We’re basically buying them time,” he said. The latest deaths raised the U.S. military death toll in Iraq to 3,217 since the war began in March2003, according to an Associated Press count. In Shiite-controlled eastern Baghdad, a U.S. Bradley fighting vehicle was hit by a roadside bomb Saturday evening, set afire and destroyed, spokesman Maj. Steven F. Lamb said. There were no casualties. Across Iraq, at least 20 people died Sunday, a sign that violence continued to abate as U.S. and Iraqi forces press ahead with what many view as a last-chance bid to quell the sectarian violence in Baghdad and central regions of the country. Police said the bodies of 16 people, most shot in the head and showing signs of torture, were found dumped nationwide. 160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set! BAGHDAD – Sunni insurgents, resilient despite the five-week security crackdown in the capital, killed at least six more U.S. troops over the weekend. A Sunni car bomber hit a largely Shiite district in the capital Sunday, killing at least eight people. The U.S. military said four U.S. soldiers died and one was wounded when the unit was hit by a roadside bomb in western Baghdad. During the ongoing security sweep in the capital and surrounding regions, the soldiers’ battalion had found eight weapons caches and two roadside bombs and helped rescue a kidnap victim, the military said. A fifth soldier was killed in an explosion in Diyala, an increasingly volatile province just northeast of the capital. A Marine died in fighting the same day in Anbar province, the vast, largely desert region that sprawls west of Baghdad to the Saudi Arabian, Jordanian and Syrian borders. The Sunni insurgency controls the regions. All of the U.S. victims were killed on Saturday, the military said in a series of statements that also reported that a seventh soldier died from noncombat injuries but gave no other details. While U.S. and Iraqi troops have flooded the Baghdad streets and a heavily armored U.S. column was sent north to adjacent Diyala province, attacks on American and Iraqi forces have been robust.