As far as we know, nobody currently has a Tsar Bomba. The Soviets only built the one that was detonated in 1961.
Russia's most powerful nuclear weapon was produced during the Soviet era called the Tsar Bomba. It is believed the bomb was the most powerful weapon of mass destruction which was developed in 1961 during the Cold War.
The initial blast would have decimated the entire city and everything within 12 miles. The mushroom cloud, with a radius of 29.5 miles, would have stretched all the way into Washington D.C. The heat from the blast would have extended out 62 miles, and would have left everyone in Dover, Delaware with third-degree burns.
In the United States' current nuclear arsenal, the most powerful bomb is the B83, which has a maximum yield of 1.2 megatons, making it 60 times more powerful than the bomb dropped on Nagasaki, Japan, in 1945. According to the Nuclear Weapon Archive, 650 B83s are in “active service.”
As of 2022, there were estimated to be approximately 4,178 nuclear warheads belonging to three NATO allies, the United States, France, and the United Kingdom.
Depending on its impact radius, even a Tsar bomb cannot destroy a whole country. Only a small country such as Vatican City or Monaco with land areas of 44 ha and 202 ha respectively can be completely destroyed using a nuclear weapon.
Thus, Tsar Bomba was viewed as a propaganda weapon. Following the 1961 blast, Sakharov became increasingly involved in efforts to limit nuclear tests to underground. Such a ban was signed by the United States, Britain, and the U.S.S.R. in 1963, and numerous other countries later joined the treaty.
The RS-28 Sarmat, which NATO has dubbed “Satan 2,” is considered Russia's most powerful ICBM: a super-heavy, thermonuclear-armed intercontinental-range ballistic missile.
Redlener identified six cities that have the greatest likelihood of being attacked: New York, Chicago, Washington D.C., Los Angeles, San Francisco, and Houston. Only New York, Washington D.C., and Los Angeles' emergency management websites give ways to respond to a radioactive disaster.
The last Russian tsar, Nicholas II, was executed by the Soviet government in 1918. The early Bulgarian emperors (10th to 14th century) and the 20th-century kings of Bulgaria (from 1908 to 1946) also called themselves tsars.
Weapon Of Last Resort: How The Soviet Union Developed The World's Most Powerful Bomb. On October 30, 1961, the Soviet Union tested the largest nuclear device ever created. The "Tsar Bomba," as it became known, was 10 times more powerful than all the munitions used during World War II.
This is why another study had been conducted in 2018 testing a similar scenario that also concluded that it would take 100 nuclear bombs to end this world. What is scarier is that within this world there are 13,080 ready-to-use nuclear warheads and yet it takes such a small amount.
So only Russia can destroy the United States because they have 4200 nuclear bombs compared to 4000 for the United States. Their anti-ballistic missile system is not as good as America's.
Canada has not officially maintained and possessed weapons of mass destruction since 1984 and, as of 1998, has signed treaties repudiating possession of them.
The volume the weapon's energy spreads into varies as the cube of the distance, but the destroyed area varies at the square of the distance. Thus 1 bomb with a yield of 1 megaton would destroy 80 square miles. While 8 bombs, each with a yield of 125 kilotons, would destroy 160 square miles.
New START limits all Russian deployed intercontinental-range nuclear weapons, including every Russian nuclear warhead that is loaded onto an intercontinental-range ballistic missile that can reach the United States in approximately 30 minutes.
Short answer: It's very unlikely. As you read above, causing a nuclear bomb to detonate requires a precise orchestration of events, without which the chain reaction does not initiate and the bomb doesn't detonate.
The U.S. military already has several rudimentary anti-space weapons. The U.S. Navy, for instance, has the SM-3, a missile originally designed to shoot down incoming ballistic missile warheads. Ballistic missile warheads briefly travel the same general route as satellites in low-Earth orbit.
Although Germany has the technical capability to produce weapons of mass destruction, since World War II it has generally refrained from producing those weapons. However, Germany participates in the NATO nuclear weapons sharing arrangements and trains for delivering United States nuclear weapons.
The current ICBM force consists of Minuteman III missiles located at the 90th Missile Wing at F.E. Warren Air Force Base, Wyoming; the 341st Missile Wing at Malmstrom Air Force Base, Montana; and the 91st Missile Wing at Minot Air Force Base, North Dakota.
The declassified study from the scientists at the Los Alamos laboratory, published in 1947 had first shed light on the question that how many nuclear bombs it would take to destroy the world. According to the study, it would take about ten to a hundred 'super nukes' to end humanity, a publication reported.