Unfortunately, no, the penultimate could prove far worse than the last global war. It appears World War 3 won't be the last. There could be at least two more world wars, with WW3 creating large zones of nuclear scorched earth first, starting in January next year.
NSA chief John Bolton leads the charge. His position now is, the Russians have nuclear bunkerbusters too, so the USA can use them as soon as they roll off the assembly line, next January. Say we use them in N Korea first, and maybe later Iran, Syria, and Mexico's South border. Then there is a 'gentleman's agreement' with Russia that they don't break the START treaty, because they aren't WMDs. Hence Russia gets to use its own nuclear weapons that are not WMDs too, with impunity from massive retaliation also. Russia might go for military installations in Ukraine right now, if it could; although Russia would probably want to warm up first in Yemen or Afghanistan.
In April 2019, John Bolton approved Boeing to manufacture 'nuclear bunkerbusters' by modifying B61-12 nuclear bombs, for deployment in N Korea next year. He claims the modified B61-12s will no longer be WMDs, because the nuclear chamber containment shape was modified to focus the blast downwards, into the ground, and the bomb's tail fin was modified to enable control of the angle at which the bomb strikes the ground, under satellite control.
In January this year, the prior secretary of defense, 'Mad Dog' Mattis, said they were still WMDs, and the Russians started making them first. But Mattis was fired the following month. John Bolton has been NSA chief since April, 2018, and is still in power.
Last year, Sandia National Labs announced the manufacturing space and tooling in Albuquerque would be ready in July this year. At first the funding was blocked by Congressional law stopping nuclear bomb development by the Department of Energy (DoE). In Trump's budget for 2018, the NSA was granted authority for nuclear bomb development, because the NSA has authority over the DoE, and so could legally fund the nuclear bomb development program independently.
After the funding approval in December, the NSA took only four months to select Boeing as the manufacturer for nuclear bunkerbusters. Boeing has been an active military contractor for the Department of Defense since at least its proposed alternative, and more technically advanced, 'delta wing' prototype for the Lockheed Martin F-35 Lightning II Catobar, which, together with the radar-invisible B2 Stealth Striker Bomber, would be the two airplanes dropping nuclear nuclear bunkerbusters any time after January next year.
This is the USA's second attempt to create a viable attack strategy on North Korea since Trump too power. First, former head of state Rex Tillerson was ordered to sell nuclear weapons to Japan. While trying to do as told, Tillerson called Trump an idiot (probably because Trump suddenly revealed he did not know what happened at Nagasaki, or the ilk). Tillerson was fired the following week, in March 2018, and Marine General Pompeo took over the Secreatary of State role. In April 2018, John Bolton took over the NSA. In March 2019, Patrick Shanahan became Acting Secretary of Defense, and is still not Senate approved.
In March 2019, after only one month in office, Shanahan deployed the largest nuclear mission since the Cold War: six B-52 bombers flew from the UK over Norway, the Baltic States, Greece, and Morocco. Four of the six B-52s were nuclear-capable. The other two were probably fuel tankers for escort jets.