1.  Nobody understands the aerodynamics of flight in these conditions and the only way to find out is to drop an experimental plane from that altitude.

2.  Nobody understands the aerodynamics of flight in these conditions, and the only way to find out is to drop an experimental plane from that altitude.

3.  An experimental plane crashed near Palm Springs International Airport, killing both people on board, officials said Saturday.

4.  An experimental plane crashed shortly after takeoff Sunday, killing the pilot and a passenger.

5.  An experimental ultra-light plane crashed in the central Philippines Thursday, killing its two Australian occupants, an air transport official said.

6.  John Denver, a singer with millions of fans worldwide, is killed when his experimental plane crashes into Monterey Bay, California.

7.  Singer left friends at golf course to try out new experimental plane.

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