George H.W. Bush offered condolences on Friday after a cardiologist who previously treated the former president was killed in a drive-by shooting. Bush, 94, issued a statement through his spokesman on Twitter after authorities said Dr. Mark Hausknecht was shot and killed by a fellow cyclist while riding near the Texas Children's Pavilion for Women in downtown Houston. "Mark was a fantastic cardiologist and a good man," Bush said in the statement. "I will always be grateful for his exceptional, compassionate care. His family is in our prayers." Bush spokesman Jim McGrath added that the nation's 41st president was "deeply...