George W. Bush undergoes partial knee replacement

WASHINGTON (Reuters) - Former President George W. Bush underwent successful surgery for a partial knee replacement, a spokesman said on Tuesday. Bush's outpatient procedure took place on Saturday in Chicago. "He was up walking around just a couple hours after the procedure and was even able to go up and down a flight of stairs just a couple hours after the operation," said Bush spokesman Freddy Ford. Bush, 67, a mountain biker and golfer, returned to Dallas on Monday "where he is recovering quickly at home," Ford said. (Reporting By Steve Holland; Editing by Bill Trott and Chizu Nomiyama)