18 U.S.C. § 2151 (Title 18—Chapter 105: Sabotage)
As used in this chapter [18 U.S.C. §§ 2151 et seq.]:
The words "national-defense premises" include all buildings, grounds, mines, or other places wherein such national-defense material is being produced, manufactured, repaired, stored, mined, extracted, distributed, loaded, unloaded, or transported, together with all machinery and appliances therein contained; and all forts, arsenals, navy yards, camps, prisons, or other installations of the Armed Forces of the United States.