During a short period in 1959, there was a squadron stationed at Flesland. From 1962 there were regular detachment within NATO that were earmarked for Flesland. Every other year there were larger exercises with about a dozen aircraft and lasting for several weeks. Smaller training sessions were held every six weeks. The air station was upgraded in 1962 and consisted of a series of mountain halls, which could house more than twenty-five fighter aircraft. These also include barracks and commando facilities. Flesland was by NATO designated as a deployment site for nuclear warheads, which had prior to 1962 been designated to Sola Air Station. Components for nuclear bombs were most probably stored at Flesland, although the warheads were probably not stored there.