COLORADO SPRINGS, Colo. — Heightened security is in place for those trying to enter through the gates of the United States Air Force Academy. To visitors of the Academy, these newly announced measures are causing some headaches.

Clark County Sheriff Kevin McMahill said Matthew Livelsberger, a 37-year-old Green Beret, likely planned a more damaging attack but the steel-sided vehicle absorbed much of the force from the crudely built explosive.

U.S. Air Force Academy cadet Emily Jean Foster passed away earlier this week while at home with her family, the Academy said in a Thursday post on social media.

Her parents also said the cadet came home at Thanksgiving with extreme exhaustion and severe headaches. Her two aggressive and advanced brain tumors were discovered Dec. 14. Superintendent Lt. Gen. Tony Bauernfeind also mourned Foster in the statement.