Not that I think they ever really went anywhere:
A Russian bomber flew over a U.S. naval base on the Pacific island ofWow! I didn't know that Russia could fly planes with Nukes all over the world! Wow! I never imagined that they could give their nuclear material to rogue agents to bomb the poo out of American cities! on Wednesday and "exchanged smiles" with U.S. pilots who had scrambled to track it, said Major-General Pavel Androsov, head of long-range aviation in the Russian air force.
Sneaky, sneaky bunch, those Russians.