MacCaulay
Banned
I imagine this could be a job for the first versions of new aircraft, a stripped down Bison bomber overflying Scotland or Alaska in 1954-5 and new Mig25s overflying Florida from Cuba in 1970-1, before the defences adjusted to the new capability.
The other one that's obvious in my mind is Northern Canada. The Soviets were already pretty big on pushing as far south from the polar region as they could, which is why the USAF and (former) RCAF/RCN created the DEW line.
There's also a logical reason for this: ingressing Soviet bombers would have to go across northern Canada to get to the US, so knowing the defenses of that area in detail would be vital. I know they played cat-and-mouse up there for awhile, but there wasn't ever anything like "There's a Bear flying over Nunivuk!" or anything.
Churchill’s “Jaw-jaw better than War-war” being the key here.
I completely agree. Both sides liked having their cars and their televisions. They didn't want to end that by throwing nuclear weapons around for a political point.