US Air Force RC-135S planes last month disguised themselves as civilian aircraft, according to a Beijing think tank. Photo: Handout
US sent 60 spy planes close to China in September: Beijing think tank
- Marked rise in flights in Yellow Sea region between China and Korean peninsula, according to Chinese government-backed body
- Increase in air refuelling may suggest United States is preparing for future long-distance missions in the South China Sea, it says
US Air Force RC-135S planes last month disguised themselves as civilian aircraft, according to a Beijing think tank. Photo: Handout
