Footage shows moments before George H.W. Bush’s former cardiologist was fatally shot

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Houston authorities say security cameras show how prominent cardiologist Dr. Mark Hausknecht, whose roster of patients included former President George H.W. Bush, was gunned down on his way to work at Methodist Hospital. The footage captures the moments just before police say a man in a tan-colored baseball hat and shorts shot the doctor. NBC’s Stephanie Gosk reports for TODAY.