Here is footage of the fatal crash after a D-21 ramjet drone was launched at Mach 3 from a mothership called the MD-21 (a modified A-12). The footage was taken from another A-12 as it was the only plane that could keep up. Both pilot, Bill Park and LCO Ray Torrick ejected, but Ray died at sea. The following link (non embeddable) shows some flight prep and is narrated: http://youtu.be/GMyC2urCl_4. I posted a good shot of the MD-21/D-21 pair here: http://rocketdungeon.blogspot.com/2012/03/your-daily-dose-of-vintage-miscellany.html.