PAPILLION, Neb. (AP) — Bail has been set for four people accused of vandalism at a U.S. defense contractor’s building in Bellevue, not far from Offutt Air Force Base. They were arrested Sunday at the Northrop Grumman building. Bail was set Tuesday. All are charged with burglary and criminal mischief.

One of them, Jessica Reznicek, of Des Moines, Iowa, said they are peace workers. She says they wanted “to bring public awareness to the fact that we really don’t know what our billions of taxpayers’ dollars are really going toward when we’re handing them over to Northrop Grumman.”

Northrop Grumman has a contract for military weather products and works with Air Force personnel at Offutt. In October, the company was selected to develop the Air Force’s next long-range bomber.