I can't find where I dug into it, but this poster has pissed me off before. Those are the wrong planes!
The Soviet Union would have been using Tupolev Tu-95s for long-range nuclear bombing of America, and those are the silhouettes of like, Tupolev Tu-4s (or Boeing B-29s (same thing)) which never had the range to bomb America while carrying a nuke.
To be fair, it does look like this is from 1951, which means it predates the Tu-95.



















