Portsmouth International Airport at Pease — Portsmouth, United States

PSM, Portsmouth International Airport at Pease, occupies the former Pease Air Force Base in New Hampshire, United States, a Strategic Air Command installation that closed in 1991 and was subsequently converted for dual civilian and military use. Today PSM hosts limited scheduled commercial passenger service alongside a significant Air National Guard presence, cargo operations, and its long Cold War-era runway makes it attractive for diversions and military refueling missions. The surrounding Pease International Tradeport has redeveloped much of the former base into commercial and business space. PSM's history as a nuclear-capable bomber base gives it distinctive infrastructure, including a runway far longer than its current civilian traffic would otherwise require.