This photo provided by NASA/JPL-Caltech in June 2020 shows a 3-by-5-inch (8-by-13-centimeter) aluminum plate between the wheels at center and right, which commemorates the impact of the COVID-19 pandemic and pays tribute to the perseverance of healthcare workers around the world, attached to the Perseverance Mars rover, in Pasadena, Calif. NASA is pressing ahead with a July 20 launch, despite the pandemic. (NASA/JPL-Caltech via AP)
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