Watch: U.S. students run to safety as 'microburst' tears apart gym roof

Three North Carolina students were injured Monday as a storm tore through their school's gym, leaving a gaping hole in the roof and wall and debris all around.Powerful video captured that moment, showing a group of more than a dozen students playing in the gym at Union Intermediate School before running to safety. "We were playing basketball, and it just sounded like something exploded in there," Chloe Brewer, a fifth-grade student told CNN affiliate WRAL. She was one of the students injured. Al