In July 2016 NASA’s Langley Research Center celebrated the 40th anniversary of the Viking program, which placed two orbiters around the red planet, and landed two spacecraft on tis surface in 1976. Historians William P. Barry, Roger D. Launius, Glenn E. Bugos, and Erik M. Conway participated in this program. C-SPAN recorded the event and C-SPAN3’s American History TV will air it this weekend. The program will air on Saturday, August 27, 2016, at 10:30pm EDT and again on Sunday, August 28, 2016, at 4:30pm ET. Once the program airs on the C-SPAN network it will become available online here: https://www.c-span.org/series/?ahtv. The promotional clip above gives details of the program. Enjoy!