A 28-year-old woman, armed with several guns, opened fire on Monday (March 27) at a private Christian school she once attended in Tennessee's capital city, killing three children and three adult staffers before police killed her, authorities said.WATCH MORE: https://thestartv.com/c/newsSUBSCRIBE: https://cutt.ly/TheStarLIKE: https://fb.com/TheStarOnline