A technician working on the Mars 2020 Perseverance rover mission takes a sample from the surface of sample tube 241 to test for contamination. Each sample tube has its own unique serial number (seen on the gold-colored portion of the tube). The image was taken in a clean room facility at NASA's Jet Propulsion Laboratory in Southern California, where the tubes were developed and assembled. https://photojournal.jpl.nasa.gov/catalog/PIA24294
Album Mars_2020_Perseverance