Voice of America shortwave coverage of the landing of
an unmanned spacecraft (Viking 1) on Mars.

Recorded off-air by Ian Holder, Brisbane, Australia.

Viking 1 (1976) information-

http://www.jpl.nasa.gov/missions/viking-1/

https://www.nasa.gov/image-feature/sunset-at-the-viking-lander-1-site

Other broadcasts-

https://archive.org/details/@i_holder