No, the United States does not have a Tsar Bomba. The Tsar Bomba was a Soviet thermonuclear bomb, detonated in 1961. It remains the most powerful nuclear weapon ever created and tested. The US has developed and tested its own nuclear weapons, but none have matched the sheer explosive power of the Tsar Bomba. The US nuclear arsenal includes a variety of weapons, but the focus has been on precision and strategic deployment rather than sheer explosive yield.