Mind you the explosive yield of nukes aren't as impressive as people think. It is the fallout that is far FAR more effective.
To put it in perspective... The nukes in WW2 didn't actually destroy either city physically with their detonation... it couldn't if they tried.
Okay, Neo, not trying to call you out, but I don't think you actually understand how nuclear fission weapons work:
The bombs dropped on Hiroshima and Nagasaki were fairly low-yield by today's standards, outputting only fifty (50) kilotons of destructive force combined (and were designed for airburst-detonation to minimize fallout and destructive force.)
Just for reference, 50 kilotons equals a 100,000,000 pound bomb made with conventional explosives (specifically measured in tons/kilotons/megatons/gigatons/etc. of TNT.)
These weapons are by today's standards about equal to the warhead used by a naval anti-ship
Tactical nuclear torpedo.
A modern
Strategic weapon ranges between 50 MEGATONS and 250 MEGATONS, and even from an airburst would flatten areas of up to fifty miles in diameter (that is reduce them to shallow craters lined with obsidian due to the insane temperatures and blast force.)
Source: U.S. Army NBC (Nuclear, Biological, Chemical) training.