 The 8th International Ice Drill Symposium 30 September 2019 - 3 October 2019: Optical Cryobots and Other Novel Methods for Deep Ice Penetration NBI Conference and Meetings IndicoOptical Cryobots and Other Novel Methods for Deep Ice PenetrationWilliam Stone Stone Aerospace Bartholomew Hogan Stone Aerospace John Harman Stone Aerospace Victoria Siegel Stone Aerospace Kristof Richmond Stone Aerospace 