A training exercise at an Air Force base in Ohio caused an emergency active shooter response Thursday, prompting a lockdown, the evacuation of a hospital and led one security force member to open fire on a locked door to get it open.
"An unknown individual called 911 believing that there was a real-world incident occurring within the base hospital," officials at the Wright Patterson Air Force Base said in a statement posted to Twitter about 3:40 p.m., roughly two hours after the base was put on high alert.