OSHKOSH, Wis. - Thousands of aviation enthusiasts heeded the Experimental Aircraft Association's call of "You've got to be there!" on the opening day of AirVenture 2005, filling the mammoth grounds for what promises to be a memorable week of flying, forums and fun. Monday's opening of the 53rd annual gathering was capped with the arrival of the ultimate experimental design, SpaceShipOne, and its carrier aircraft, White Knight. Designer Burt Rutan, longtime member and hero of the EAA, arrived on his now-famous futuristic craft to cheers from the crowd pressed along the ropes before the runway. "This certainly has got to...