The U.S. Air Force will soon begin qualification testing of its B61-12 guided thermonuclear bomb, just as President-elect Donald Trump pledges to strengthen Washington’s nuclear arsenal in response to Russia’s modernization plans. With the imbalance between the U.S. and Russia’s stockpile of tactical nuclear weapons tipping strongly in Moscow’s favor, the Obama administration’s program to extend the life of the 1968-vintage B61 and add an internally guided tail ...


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