 We must stand together. Biden was speaking last night at the White House. The FBI says it believes the 20-year-old alleged gunman who wounded Trump in the right ear acted alone when he opened fire from a rooftop outside the rally venue in the city of Butler. That's north of Pittsburgh. One attendee was killed by the gunfire and two others were wounded. Authorities shot and killed the alleged gunman, who's identified as Thomas Matthew Crooks.