NASA's SOFIA: the world’s only flying observatory, a highly modified Boeing 747SP, now retired and on display at the Pima Air & Space Museum.

On standby for the Arizona Air National Guard at PHX

Landing at PHX

American Airlines maintenance hanger at PHX

Landing at PHX

Southwest Maintenance area at PHX

Landing at PHX

Landing at PHX

Landing at PHX

Ready for takeoff at PHX

Enjoying the day at PHX

Waiting at PHX

Sitting at PHX

Just hanging out at PHX

Just landed at PHX

Taxiing at PHX

Taxiing at PHX

Just landed at PHX

Just landed at PHX

Taxiing at PHX