After Allegany County authorities were notified that a Mark 1 rocket on display in Cumberland might be live, the state fire marshal's office and the FBI were called and both thought it indeed was a live munition.
Army bomb experts removed the ordnance, examined it and determined it to be just a dud.
The 48-inch-by-2.75-inch rocket was similar to those used on helicopter gun ships during the Vietnam War, said Deputy State Fire Marshal Joseph Zurolo Jr. A local veteran donated it to the museum, which is in a chapter of the Vietnam Veterans of America, Zurolo said.
