Two wounded, shooter dead at Maryland high school

A 17-year-old student armed with a handgun shot and critically wounded a female classmate at a Maryland high school on Tuesday, officials said, in an outburst of violence just days before a student-organized nationwide march for gun control.St. Mary's County Sheriff Tim Cameron said the assailant, identified as Austin Rollins, died of a gunshot wound after a school security officer "engaged" with him at Great Mills High School in southern Maryland.Cameron said the security officer fired a shot a