I'm not sure if this interview has been posted here, as this is quite old but nonetheless an astonishing discussion which "should" have made the main stream.

Former NASA Scientist Richard Hoover shares revelations with journalist Lee Speigel from the Huffington Post. Hoover talks about the fact that someone may have destroyed evidence of life on Mars. This took place at the Open Minds 2014 International UFO Congress and Film Festival in Fountain Hills Arizona.