Tribute plaque to healthcare workers during the Covid-19 pandemic on Perseverance, the Mars 2020 rover. The Mars 2020 mission, part of NASA'S Mars Exploration Program, launched on 30th July 2020. It carried the Perseverance rover and Ingenuity helicopter. The rover will search for habitable conditions in the ancient past and signs of past microbial life on Mars. The helicopter will test the first powered flight on Mars. Photographed in May 2020, at NASA's Kennedy Space Center, Florida, USA.