 ABC News, I'm Mark Remillard. The FBI investigating Saturday's shooting at former President Trump's rally near Pittsburgh, saying they believe they've identified the gunman but are not yet releasing his identity. The Associated Press reporting the gunman is a 20-year-old man from Pennsylvania. Shots rang out as Trump was speaking on stage, a bullet apparently grazing his ears. Authorities calling it an apparent assassination attempt. Authorities say the gunman opened fire from a rooftop a few hundred yards away.