Under Thailand's "gentleman's agreement" with the United States, Royal Thai Air Force Bases used by the USAF were considered Royal Thai Air Force bases and were commanded by Thai officers. Thai air police controlled access to the bases, along with USAF Security Police, who assisted them in base defence using sentry dogs, observation towers, and machine gun bunkers. All United States Air Force personnel were not fully armed. There were insufficient arms due to the nature of the mission at NKP. Often instructions were given prior to off-base activities to avoid answering questions posed by the press.