The B-1 is longer a nuclear bomber, its only a dirt mover. It can be refitted to carry nuclear weapons, but over a period of time that wouldn't help during a nuclear conflict. In addition the USAF has no plan to convert the B-1 back in a nuclear bomber.
The current upgrade program for Tu-160's allows it carry some conventional bombs and PGM's. Though most of the upgrades deal with bringing new types of cruise missiles into service. The Blackjack is still mostly a nuclear bomber, but the fleet will soon have expanded conventional capabilities.
The current upgrade program for Tu-160's allows it carry some conventional bombs and PGM's. Though most of the upgrades deal with bringing new types of cruise missiles into service. The Blackjack is still mostly a nuclear bomber, but the fleet will soon have expanded conventional capabilities.