One MIRV’d SLBM destroys North Korea. One missile!
Yes, and we have about 240 MIRVed missiles available for the rest of the bad guys. That's a total of almost 1800 nukes each with 5 times the destructive force of the Hiroshima and Nagasaki bombs.
Sebastien Roblin
January 21, 2017
Nine years after the atomic bombings of Hiroshima and Nagasaki, Ishirō Honda’s Godzilla depicted a monster awakened from the depths of the ocean to wreak havoc on Japanese cities. A giant fire-breathing reptile, however, was less horrifying than what was to come. In less than a decade’s time, there would be dozens of real undersea beasts capable of destroying multiple cities at a time. I’m referring, of course, to ballistic-missile submarines, or “boomers” in U.S. Navy parlance.
The most deadly of the real-life kaiju prowling the oceans today are the fourteen Ohio-class ballistic-missile submarines, which carry upwards of half of the United States’ nuclear arsenal onboard.
If you do the math, the Ohio-class boats may be the most destructive weapon system created by humankind. Each of the 170-meter-long vessels can carry twenty-four Trident II submarine-launched ballistic missiles (SLBMs) which can be fired from underwater to strike at targets more than seven thousand miles away depending on the load.
As a Trident II reenters the atmosphere at speeds of up to Mach 24, it splits into up to eight independent reentry vehicles, each with a 100- or 475-kiloton nuclear warhead. In short, a full salvo from an Ohio-class submarine—which can be launched in less than one minute—could unleash up to 192 nuclear warheads to wipe twenty-four cities off the map. This is a nightmarish weapon of the apocalypse.
http://nationalinterest.org/blog/the-buzz/why-russia-china-fear-americas-ohio-class-submarines-19120