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In the Belgian Congo, natives greeted the Americans effusively, mistaking them for the vanguard of an army that they thought had been sent to liberate them. The Emperor of Ethiopia turned his imperial race track into a parking lot for the caravan, assigned a special guard to see it through parts of his realm that are so remote that he holds only token sovereignty. At Aswan there were drinks at the winter residence of the Begum Aga Khan. And there, too, the caravan was stoned—apparently for the benefit of the Soviet Union, which is financing the Aswan High Dam. But last week, chirpy as ever, Wally Byam was convinced that one thing had been proved: "The old folks can achieve just as much as young ones on a trip like this—only it takes them longer."