A
deployment would take days - don't play word games, focus on substance, you know what I said. Seizing on me not typing out entire novels to explain and take every insignificant caveat into account does not further anything. Substance.
Also, that it is a distant possibility does not support your absurd "US attack/invasion/submission of Russia" case as you fail the reality check on the prerequisistes of a deployment.
Sorry, but no cigar.
To the practical and technical stuff. Why do that at all, when the US has 3,000 nukes that take 15-20 min to get there and bombers that can fly directly to Russia from CONUS via more relevant flight paths?
They don't need those bases and that basing. The routes from Euro bases are unfavourable, and longer for deepstrike. The bombers would also be more vulnerable en route and on their basing.
The only purpose would be to send the political statement that Russia shouldn't attack Europe in a time of crisis. And that if Russia attacks Europe, the US will get involved. To take this further, and perhaps most importantly, I note that there are none based in Europe
now.
The posture is not there!
Here is a link calculating distances of the great-circle. The great-circle is the shortest distance to travel.
http://www.acscdg.com/
The B2's are stationed in Whiteman AFB, 65 miles southeast of Kansas City, Missouri. You can type in Kansas City or Whiteman AFB and it will take you there for a starting point.
Here is an reasonable description of the layout of Russian ICBM bases.
http://www.globalsecurity.org/wmd/world/russia/icbm_fac.htm
Try it out, from Whiteman AFB to the Russian nuke installations, with and without a waypoint in Europe. Btw, notice who the Russian missiles are actually facing.
Also note which bases are active today.
It should now become apparent why the B2's are stationed in Missouri.
Also, the northern coast of Russia is difficult to defend, easier to penetrate for the B2. This is contrasted by the heavily defended airspace facing Europe.
Shorter in time and distance and tactically/strategically more lucrative to go the polar route.
The Russian ICBM take the same route. A Europe based NMD has no chance of intercepting a Russian ICBM on its way to the US. In rough terms the ICBM will have to be headed towards Europe to enter the GBI engagement footprint.
Physics
and geography.