China's arms industry giant China North Industries Group Corporation Limited (NORINCO) has designed a large-yield bomb which Chinese media.
Cannikin Nuclear Test Footage
The largest underground nuclear test conducted by the United States, Project Cannikin was one of three underground nuclear tests performed at different places on this 43-mile long island in the Aleutian Chain. This $200 million 1971 test was performed to test an Anti-Ballistic Missile warhead, for a Spartan ABM missile. It consisted of a 5 megaton-yield thermonuclear bomb, detonated in a 50-foot diameter chamber, at the bottom of a 5,875-foot shaft. The island of Amchitka was a military outpost in WWII, and the air field and base camp from that facility were reused for the nuclear testing program.