Two helicopters made at Leonardo’s Northeast Philadelphia assembly plant to check nuclear accidents and potential terror attacks are going through testing at Andrews Air Force Base in Maryland, as the company adds staff at the plant in anticipation of more sales to the U.S. government.

Leonardo, based in Italy, delivered the two AW139 helicopters last month to the federal National Nuclear Security Administration. The agency, according to its website, monitors public events such as the Super Bowl, and is on call 24 hours a day to respond to “accidents and incidents” affecting nuclear facilities or nuclear material, from Andrews and a second facility at Nellis Air Force Base in Nevada.