U.S.-China Peoples Friendship Association - nonprofit educational organization whose purpose is to build friendship between the peoples of China and the United States.
Reconnaissance Flights and Sino-American Relations - includes declassified archival material that looks at U.S. policy on reconnaissance flights over China during the Cold War. From the National Security Archives.
Spy Plane Standoff - includes an interview with the Chinese ambassador, U.S. foreign policy veterans, and a disussion with U.S. military experts on the incident. From PBS' Online Newshour.