Rangers and fire personnel examine the wreckage of the crashed plane. (AP)

    BEIJING, June 28 -- John Walton, the billionaire son of Wal-Mart founder Sam Walton, died Monday in a plane crash in Wyoming.

    Fifty-eight year-old Walton was piloting an ultra light that crashed shortly after takeoff from the Jackson Hole Airport in Grand Teton National Park.

    Officials said the cause of the crash was unknown.

    The plane was an experimental ultra light aircraft with a small, gasoline-powered engine and wings wrapped in fabric similar to heavy-duty sailcloth.

    In March, Forbes Magazine listed John Walton as No. 11 on its list of the world's richest people with a net worth of 18.2 billion US dollars.

    
(Source: CRIENGLISH.com)