meantime, two f-16 fighter jets from the north american aerospace defense command better known as norad intercepted four russian aircraft near alaska yesterday. deemed international airspace. their actions were not seen as threatening or provocative. norad said such incidents are routine and are not related to the high altitude objects in recent weeks. meantime, here in the u.s., three students were killed, five seriously wounded in a shooting on the campus of michigan state university last night. the gunman took his own life after getting cornered by authorities. the incident has left that entire community stunned. searching for answers. senior correspondent mike tobin shows us tonight from east lansing, michigan. all three of the students killed monday night were from michigan. ariel anderson and brian frazier were from gross point. alexandria veteranner claw son outside of the detroit.