TEHRAN The United States has planted more than 20 espionage devices in the presidential Boeing 767 built for President Jiang Zemin, London's *** Financial Times *** reported on Saturday. Recording devices were found in the lavatory, the headboard of the presidential bed and other parts of the plane. The discovery comes at a sensitive time, with U.S. President Bush planning to visit Beijing for a summit next month, the first such trip since Richard Nixon went to the Chinese capital 30 years ago.