no tests are currently done
No, there is an international agreement on banning testing, which the US observes
There have been many nuclear explosion in the US in places like, Nevada and New Mexico. In anger against the US no. Japan still remains the only country in the world to be bomb in anger with nuclear weapons.
Yes, and still does.
Nevada used to have fairly lenient laws regarding testing of automatic weapons. I think you can still find controlled ranges where you can test-fire full-auto.
It is unclear who "you" is in this scenario. There are many who profit from making nuclear weapons, especially the individuals who are paid to assemble the weapons and their components. Whether or not nuclear proliferation is profitable as a form of conflict deterrence is still very controversial.
I think they are still testing
Yes
No, the us no longer tests nukes.once the Cold War threat ended so did nuke testing and plants that made plutonium stopped production and stopped sending nuclear materials to bomb factories
No, they are taken apart and the materials stored.
Because there was no true defense against nuclear weapons. Once both sides had nuclear weapons, the only way to "protect" themselves from the other side was to have so many more nuclear weapons that even if their enemies used all of their nuclear weapons, there would still be nuclear weapons to shoot back with. That way, nobody would use nuclear weapons, because they could never actually "win" that way. This thought process was referred to as Mutually Assured Destruction, or MAD.
i believe it was the nuclear nonproliferation treaty. No treaty bans nuclear weapons. The nonproliferation treaty simply tries to limit them to countries that already have them. But countries that don't sign can still try to make them.
yes, it still is