FILE - In this Feb. 21, 1972, file photo, Chinese communist party leader Mao Zedong, left, and U.S. President Richard Nixon shake hands as they meet in Beijing, China. Nixon made the historic journey to meet Chinese leader Mao Zedong in part paved by a U.S. pingpong delegation that traveled to Beijing a year earlier. Their historic handshake was as much about countering the Soviet threat as building trade and cordial relations between the two countries. (AP Photo, File)