So would all MIRVs? That's how you do most damage over the largest area. Ground level blasts are a waste of resources for conventional nukes.Both bombs over Hiroshima and Nagasaki detonated in high altitudes though.
Only Bunker Busters would detonate on ground level or below. And as far as I know you don't MIRV bunker busters in the current generation.
Maybe the Russians have made some MIRV'ed bunker busters especially for Cheyenne mountain or something, but that would be the exception, not the rule.
None would detonate on the ground. If they fail to detonate at their intended altitude, it's highly unlikely that they will detonate at all.Yep, I'm well aware that most the warheads are set to detonate above ground.
I think that in case of global nuclear war every big city would have been hit by several warheads though, some of them set to detonate in air and some on ground. Or perhaps one or two earth penetrating too!
With the current economy, do you really think those supplies are up to snuff?Russkies know that there is a huge fallout shelter beneath most of the big hospitals in any huge city for instance, with enough food, water, and medical supplies to support hundreds or thousands of people for months. For example, there was enough of these shelters to provide safety for a half of citizens in Czechoslovakia - more than 7.5 million people, so they'll try to render them unusable or damage these underground structures enough to make them unsafe/inoperable.
Even at peak Cold War, the USA was using crackers which were to hard you could break teeth and you needed to soak them to eat them. These crackers often also turned out to contain worms (lol protein).
And you think that Russia maintains those shelters and supplies diligently?
Don't make me laugh.
Besides, the issue (as demonstrated in many Cold War drills) is getting that "half of the populations" to those shelters at all. And in the Cold War people were aware of the threat, had a large Civil Defense to guide them and we taught in school how to act. I'd be amazed if current citizens know what to do.
After the launch order has been given, you have 4 minutes before launch and ~30 minute flight time before detonation for nukes from the US to Russia. For continental missiles in France, Britain or Israel about half or a third of that. How exactly are you going to let half your population know to get to bomb shelters in that time? Not everyone listens to radio or tv, or checks the internet. Sure, we have air horns, but who's actually going to act upon hearing it?
When I hear an air horn here, it's to call in the voluntary firemen for a fire or other accident because the normal method of contacting them through cellphones etc did not make enough people turn up. I'm sure we have an air horn signal meant for bombardments, but I sure as hell don't know the difference between the volunteer fireman call and the nuclear bombardment call. So I'd be oblivious of the threat.