This was a different incident, which took place on April 30, 1962 when Joseph Walker was flying the X-15. He filmed UFOs twice during his test flights, at least that I know of. The films have been shown on TV here in the US, although now they are in the hands of a private part who is looking to sell them.
These UFOs were flying higher than faster than even our most advanced spy planes like the U-2 and the Oxcart.
Edited by TheMacGuffin, 05 July 2012 - 06:11 AM.