Industrial grade Bull#$%^
The HQ has been here since 1953.
Article 5 has to do with an attack on any member by an external party and has only been invoked once, on September 11th, 2001.
NATO does not run Norfolk Naval Base, they are a tenant unit there.
This is SF street grade BS. There are NATO HQs established in the territory of many NATO members. SHAPE in Mons, CINCIBERLANT outside Lisbon Portugal, etc. They are all tenants of the host country.