Hanger One is being dismantled. Hanger One has been in danger of being torn down for years. It’s walls are contain PCBs. Save Hanger One, has been trying get NASA to reskin the hanger instead of tearing it down. NASA Ames now wants to use it for airship research. Federal funds were finally approved to reskin the hanger, until the House appropriations committee, on recommendation from the NASA Office of the Inspector General, eliminated the $32.8 million to replace the skin. This means PCB walls will be removed, and hanger will probably be torn down.
I say “probably,” because at the last minute the House changed the appropriations bill language to allow NASA to reapply for funds to reskin the hanger in the future. It is supposed to be painted with a sealant to protected it while NASA reapplies for funds.
Personally, I suspect it will be torn down in three years.