NASA holds a news conference following Cassini's grand finale

Cassini post-end of mission news conference after the spacecraft plunged into Saturn's atmosphere for its grand finale. Subscribe to The Washington Post on YouTube: http://bit.ly/2qiJ4dy Follow us: Twitter: https://twitter.com/washingtonpost Instagram: https://www.instagram.com/washingtonpost/ Facebook: https://www.facebook.com/washingtonpost/