China has claimed that its J-20 Mighty Dragon stealth fighter jet flew undetected over the heavily monitored Tsushima Strait near Japan. The area is covered by advanced radar systems from the U.S., Japan, and South Korea, including the THAAD missile defense system. If true, experts say this would represent a major failure in Western air defense. Reports suggest the jet flew from China’s First Fighter Brigade, circled Taiwan, and returned via the strait located between Japan and South Korea.






