Xian Y-20

Readers write about South Korea’s KF-21, NASA'S Psyche, China's Y-20, a quadriplegic pilot, JetBlue-Spirit merger and more. Plus: Behind the Scenes at Dubai.

New designs will enable China to extend airpower reach to U.S. forces in the Western Pacific.

Developed by China's AECC, the CJ-1000A has been developed as an alternate powerplant for the Comac C919 narrowbody airliner.