In which year did NASA officially bring back the retired 'Worm' logo for limited use, after it had been discontinued since 1992?

NASA's visual identity has evolved significantly over the decades, representing not just an agency but humanity's aspirations in space. Among its most iconic brand elements, NASA has two primary logos - the 'Meatball' (the blue circle with stars and red chevron) and the 'Worm' (the sleek, modern red letterform). The story of these logos reflects changing design philosophies and NASA's public image strategy across different eras of space exploration.

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2015, coinciding with New Horizons' Pluto flyby
2020, debuting on the SpaceX Crew Dragon Demo-2 mission
2017, as part of NASA's 60th anniversary celebrations
2022, launching with the James Webb Space Telescope