Citing a lack of time, Oprah Winfrey, 46, has passed on an offer from President George W. Bush to join an official U.S. delegation to tour Afghanistan's schools, where young women have been allowed to return after the fall of the Taliban regime. "She was invited and she respectfully declined," a spokeswoman for Winfrey's Chicago-based Harpo Productions told the Associated Press. "Due to her responsibilities to the show, she is not adding anything to her calendar." According to the Chicago Tribune, the White House has postponed the junket, which was to have included such top presidential advisers as counselor Karen Hughes and, possibly, national security adviser Condoleezza Rice. The Tribune noted that another celebrity of Winfrey's magnitude would be difficult to find. There was no immediate comment from the White House on the talk-show host's decision. Some perceived Winfrey's invitation as part of the administration's efforts to soothe the brutal image of the war on terrorism. Meanwhile, Winfrey's Web site contains a page that lists organizations that provide assistance to women in Afghanistan.