 This is CBS News on the Hour, sponsored by O'Reilly Auto Parts. I'm Debra Rodriguez. Emotional moments on the first night of the Republican National Convention during an unannounced appearance by the party's nominee, who wore a white bandage on his ear, about 48 hours after a gunman opened fire on him at a campaign rally. Correspondent Ed O'Keefe is in Milwaukee. President Donald Trump made his first public appearance since surviving an assassination attempt.