I would, at this juncture, point out the slightly surreal fact that it is 2024 and:
The primary American strategic bomber is the B-52. The basic aircraft first flew in 1952.
The primary Chinese strategic bomber is the H-6. While the H-6 itself is newer, this is the Chinese version of the Soviet Tu-16, which started being manufactured in 1952.
The primary Russian strategic bomber, two of which were flying along with this H-6, is the Tu-95, which started being manufactured in 1952.