Since sometime in june/july 1945. The first one detonated on july 16, 1945 (this was originally scheduled to occur on july 4, 1945 but was delayed due mostly to weather and as the type of device tested took about 3 days to assemble it was probably ready in a kit at Los Alamos by late june). Actual combat weapons shipped out from Los Alamos in july arriving on Tinnian in the pacific before the end of july. They were used on august 6 & 9, 1945.
Since 1945.
The first one was detonated on July 16, 1945.
The UK has been nuclear for a very long time. It has lots of nuclear energy stations and lots of nuclear weapons.
The long term result of the use of the Atomic bomb by the US in WW2, has been building new and larger nuclear weapons/bombs. Despite the advances in nuclear activity, it can clearly be seen that the "fear" of using the mass destruction of nuclear weapons has been that no more nuclear or atomic bombs have ever been used again.
Anywhere, as long as you have the money.
Without nuclear weapons, another nation with nuclear weapons could launch an attack without worry of a retaliation. There are not that many ways of diverting a long-range ballistic missile.
So long as nuclear weapons and the motive and means to use them exist, yes
I believe it would very likely become a hot war long ago, probably a conventional WW3. Nuclear weapons scared people a lot, but probably prevented another global war.
While nuclear weapons have the potential to cause massive destruction, it is unlikely that they could destroy the entire world. However, a large-scale nuclear war could have catastrophic consequences for civilization, causing widespread devastation, loss of life, and long-term environmental impacts. Efforts to prevent the use of nuclear weapons are crucial for global security and peace.
Nuclear weapons have the potential to cause massive devastation, including widespread destruction and loss of life. However, it is unlikely that they could completely destroy the world or the planet itself. The use of nuclear weapons would have catastrophic consequences with long-lasting impacts on the environment and civilization.
Nuclear weapons are harmful due to their destructive power, capable of causing mass casualties and widespread devastation. They also pose risks of long-term environmental damage, nuclear fallout, and radiation sickness. Additionally, the threat of nuclear warfare escalates global tensions and increases the risk of proliferation.
Strategic Arms Reduction Treaty (START)