The U.S. claims China is conducting secret nuclear tests. Here's what that means

The allegations were leveled by U.S. officials late last week. Arms control experts worry that norms against nuclear testing ...
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Inside Lockheed’s 6,000-ton nuclear attack carrier concept

What if the U.S. Air Force had a flying nuclear-powered carrier? In the 1960s, Lockheed proposed just that with the CL-1201 a massive aircraft that could stay airborne for weeks, providing a mobile ...