Boy, 13, guns down two staff members in horror school shooting as students forced to climb 20ft wall to escape bullets

A 13-YEAR-old gunman has killed two staff members and injured several others in a school shooting in Brazil. Horror footage shows panicked students being hurriedly rushed into a classroom at the public school Instituto Sao Jose in Rio Branco, in the northern state of Acre. Cops arrested the teen suspect, who has admitted to carrying...