RICHMOND, Va. — A teenage gunman opened fire as hundreds of people stood outside after a high school graduation ceremony Tuesday evening in Richmond, Virginia, killing two people and wounding five others, the city’s interim police chief said. As merriment turned to terror around Richmond’s Monroe Park, other people were hurt as they tried to escape the gunfire, including a 9-year-old girl who was hit by a car, Richmond Interim Police Chief Rick Edwards told reporters Tuesday night. Police initially detained two people but later said one was not involved. The other – a 19-year-old who investigators think may have...