Under the great "peace president" (Obama ad-Dajjal), the US has embarked on an upgrade of its nuclear weapons:
The B61-12 is widely believed to be a new weapon. Being a guided nuclear munition, it can hit targets far more precisely than its predecessors. The capability to penetrate below the surface has significant implications for the hardened targets within the B61-12’s reach.
The "dial-a-yield" technology, the explosive force can be adjusted before launch. It is designed to have four selectable explosive yields: 0.3 kilotons (kt.), 1.5 kt., 10 kt. and 50 kt. This combination of accuracy and low-yield make the B61-12 the most usable nuclear bomb in America’s arsenal. The smaller yields and better targeting can make the arms more tempting to use – even to use first, rather than in retaliation, knowing the radioactive fallout and collateral damage would be limited.
The B61-12 will initially be integrated with B-2, F-15E, F-16, and Tornado aircraft. From the 2020s, the weapon will also be integrated with, first, the F-35A bomber-fighter F-35 and later the LRS-B next-generation long-range bomber. The US Air Force says it does not predict when the squadron of F-35s will be combat-proven, but that it is probably during one of its overseas deployments at the beginning of 2017. The new bombs lower the nuclear threshold or make the launching of a nuclear attack against Russia more likely.
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You can bet your sweet bippy that Israel has such weapons, too.
Do we really want to make nuclear war easier to start and more likely to happen? I don't.
To the best of my knowledge, Russia and China have done nothing to harm the US. So why are we so eager to harass them and goad them into war?