
Emergency responders were called to a Northrop Grumman manufacturing and testing facility Wednesday, April 16.
An explosion at the Promontory, Utah facility owned by aerospace and defense technology company Northrop Grumman was reported Wednesday, at 9:38 a.m. EDT (1338 GMT, 7:38 a.m., local time in Promontory). Emergency responders arrived to the scene to find one building completely destroyed.