An unmanned spaceship funded by Internet billionaire Jeff Bezos suffered a major failure during a recent test flight, according to U.S. government and industry officials, highlighting the dramatic risks of private space ventures. The vertical takeoff and landing spacecraft, developed by closely held Blue Origin LLC, was on a suborbital flight from the company's West Texas spaceport last week, these officials said, when ground personnel lost contact and control of the vehicle. The exact nature and cause of the failure were unclear, but remnants of the spacecraft could provide clues for investigators. Parts of the vehicle were recovered on the...