HIGH ELEVATIONS EQUAL HIGH STAKES FOR TOM Tom is headed to Mount Everest. Not only will he get some sweet practice time in on his new foil kite snowboard, but he and Bud are going to put his latest invention -- a robot Sherpa -- to the test. At Everst's high elevations they will really be able to run the Sherpa through its paces. But Tom can't quite focus on the tasks at hand because while there are always rumors of the mysterious...