Science/Nature, Technology Mars 2020: Recorded presentation of NASA news conference on Mars 2020 rover by JOHN ADAMS • 07/31/2014 • Comments Broadcast live streaming video on Ustream Via Mars 2020 Instruments, Live from NASA Headquarters in Washington: A news conference to announce Mars 2020 rover instruments. Original air date July 31, 201…. See, also, Mars 2020 Science Definition Team Report Frequently Asked Questions (pdf).