English: A full-scale prototype of the high-gain antenna on NASA's Europa Clipper spacecraft is undergoing testing in the Experimental Test Range at NASA's Langley Research Center in Hampton, Virginia. The Europa Clipper is expected to launch on a mission to conduct detailed reconnaissance of Jupiter's moon Europa in the 2020s. NASA's Jet Propulsion Laboratory manages the Europa mission for the agency's Science Mission Directorate in Washington. For more information about NASA's Europa mission, visit: http://www.nasa.gov/europa.