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LTA Research's own update and IEEE Spectrum both date the first flight over San Francisco Bay to 15 May 2025: 'On 15 May, startup LTA Research flew its Pathfinder 1 airship outside Silicon Valley's Moffett Federal Airfield for the first time.'[1]LTA Research's Pathfinder 1, the largest aircraft in the world, flew beyond its Moffett Field base in California and over San Francisco Bay for the first time on 15 May 2025 - the first rigid airship of its size to fly since the 1930s. Its larger successor, Pathfinder 3, is being built in the century-old Goodyear Akron Airdock.
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