Former President George H.W. Bush waves as he leaves Methodist Hospital with his cardiologist, Mark Hausknecht, after a news conference in Houston. Hausknecht, who once treated former President George H.W. Bush, was fatally shot by a fellow bicyclist Friday, July 20, 2018, while riding through a Houston medical complex, and police were trying to determine if the shooting was random or a targeted act. (AP Photo/David J. Phillip, File)
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