 As security service agents put their bodies between Donald Trump and the shooter, in the crowd, a father did the same for his family. Corey Comparatore, at the rally with his wife and daughter, was hit in the head during the shooting. Emergency doctor Jim Sweetland tried unsuccessfully to keep him alive. I looked up to see his family, who had witnessed my efforts at resuscitation, and the look on their faces said it all. My heart goes out to that family.