Nov. 5 (UPI) -- The return of three Chinese astronauts in orbit has been put on hold after space debris caused damage as they geared up to head back to Earth. China's Manned Spaceflight Agency said Wednesday its Shenzhou 20 mission Commander Chen Dong and astronauts Chen Zhongrui and Wang Jie will remain in space longer on China's Tiangong space station after their return craft was hit by suspected debris. "To ensure the health and safety of the astronauts and the successful completion of the