This Sept. 23, 2015 photo shows ground crew moring the Goodyear Blimp “Sprit of Innovation” as it comes in for a landing at Goodyear Airship Base in Carson, Calif. Goodyear is letting the helium out of the last of its fabled fleet of blimps on Tuesday, March 14, 2017. Its replacement, “Wingfoot Two,” will look about the same when it arrives at Goodyear’s California airship base in Carson later this year. But it will be a semi-rigid dirigible. (AP Photo/Richard Vogel)