Here’s What You Need to Know: Skies were clear, and the modified U-2Gs preformed well, snapping photos of the French test site without being detected. They snapped ...

The Soviet Union detonated its first atomic bomb, known in the ... U.S. no longer had a monopoly in hydrogen weapons. The scientists, who were already at the test site heard the speech on the ...

The North says it tested a hydrogen bomb that could fit on to a long-range ... network of mobile missile launchers and underground testing sites that are all but invisible to US satellites.

Fires ballistic missile over Japan and into the Pacific, acknowledging for the first time that it has done so. South Korea ...

North Korea appears to have succeeded in miniaturizing a nuclear warhead, Defense Minister Song Young-moo said Monday, a day ...

The thermonuclear hydrogen bomb test near the Bikini Atoll in the Marshall Islands on March 1, 1954 (Provided by U.S. military) By 1967, the wooden fishing boat ended up being abandoned as junk.