 An American citizen killed while simply exercising his freedom to support the candidate of his choosing. The president extended condolences to the family of Cory Comperatore, who was killed while attending the Trump rally in Pennsylvania. We should all hold his family and all those injured in our prayers. The president, who spoke with Trump, says he's grateful he's okay and he's extending all necessary security to keep him safe. Linda Kenyon, CBS News, Washington.