Context: The original NAS Bermuda on the west side of the island, a seaplane base until the mid-1960s, was designated as the Naval Air Station Bermuda Annex. It provided optional anchorage and/or dockage facilities for transiting US Navy, US Coast Guard and NATO vessels, depending on size. An additional US Navy compound known as Naval Facility Bermuda (NAVFAC Bermuda), a SOSUS station, was located to the west of the Annex near a Canadian Forces communications facility. Although leased for 99 years, US forces withdrew in 1995, as part of the wave of base closures following the end of the Cold War.

Question: What was the NAS primarily a base for?
Answer: seaplane

Question: What did the NAS Bermuda offer once designated Annex?
Answer: anchorage and/or dockage facilities for transiting US Navy, US Coast Guard and NATO vessels

Question: What is located west of the NAS Annex?
Answer: additional US Navy compound known as Naval Facility Bermuda

Question: What happened at the end of the Cold War?
Answer: US forces withdrew

Question: What was built in 1960?
Answer: Unanswerable

Question: What became the NAS Bermuda?
Answer: Unanswerable

Question: What did US forces do in 1999?
Answer: Unanswerable

Question: What was leased for 95 years?
Answer: Unanswerable