Marking the end of the U.S. combat mission in Iraq, President Obama said Tuesday night that America would continue supporting Iraq's government while also looking to refocus its energies on the U.S. economy and the war in Afghanistan. "The United States has paid a huge price to put the future of Iraq in the hands of its people," Obama said in an address from the Oval Office. "... Through this remarkable chapter in the history of the United States and Iraq, we have met our responsibility. Now, it is time to turn the page." The U.S. combat mission in Iraq officially ended at 5 p.m. ET Tuesday, more than seven years after the U.S.-led invasion that toppled Saddam Hussein. Roughly 50,000 U.S. troops will remain in Iraq until the end of 2011 to train, assist and advise Iraqi troops; such troops could remain beyond that if Iraq requests it and the United States agrees.