New Horizons principal investigator Alan Stern of the Southwest Research Institute (SwRI), Boulder, CO, reads an e-mail sent by Associate Administrator for NASA's Science Mission Directorate Thomas Zurbuchen during a press conference prior to the flyby of Ultima Thule by the New Horizons spacecraft, Monday, Dec. 31, 2018 at Johns Hopkins University Applied Physics Laboratory (APL) in Laurel, Maryland. Photo Credit: (NASA/Joel Kowsky)