Alizarin Erythrosin writes: An explosion at a Mojave desert test site during a "cold fire" test for SpaceShipTwo's rocket engine went disastrously wrong. Reports are that 2 personnel were killed and 4 serious injured. Scaled Composites founder Burt Rutan was not at the site at the time of the explosion. The CNN story has an included aerial picture of the site. It is still unclear whether the actual test caused the explosion or if it was preparation for the test, as the nitrous oxide used in the rocket motor is the suspected cause.