Branson Denies Ignoring Safety Concerns Over Virgin Galactic Spacecraft

A piece of debris is seen near the crash site of Virgin Galactic's SpaceShipTwo near Cantil, California, Nov. 1, 2014.

The Virgin Galactic SpaceShipTwo rocket explodes in mid-air during a test flight above the Mojave Desert, in California, Oct. 31, 2014.

National Transportation Safety Board (NTSB) Vice President Christopher Hart talks about the crash of Virgin Galactic's SpaceShipTwo near Mojave, California, Nov. 2, 2014.

Investigators from the National Transportation Safety Board look at wreckage from the crash of Virgin Galactic's SpaceShipTwo near Cantil, California, Nov. 2, 2014.

Investigators from the National Transportation Safety Board (NTSB) walk through one of the debris fields from the crash of Virgin Galactic's SpaceShipTwo near Cantil, California, Nov. 1, 2014.