NASA Director of Planetary Science Jim Green (L), Cassini Project Manager Earl Maize (2L), Cassini Project Scientist Linda Spilker (2R) and Hunter Waite, (R), team lead for Cassini Ion and Neutral Mass Spectrometer, speak at a news briefing for the end of the Cassini mission to Saturn, at NASA's Jet Propulsion Laboratory in Pasadena, California, Sept. 13, 2017. The Cassini mission will end on Sept. 15, 2017 when the spacecraft burns up after intentionally plunging in the ringed planet's atmosphere. (Photo/Agencies)