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when was the first weapon ready thermonuclear bomb tested
On November 1, 1952, the United States tested its first ever thermonuclear device.
where was the united states' first thermonuclear device tested
The United States' first thermonuclear device test took place on the small Pacific island of Elugelab at Enewetak Atoll in the Marshall Islands.
where are the marshall islands on a map

Question: what's the surface area
Self-contained rewrite: what's the surface area of the marshall islands