Nuclear weapons?

Question

I just wonderd what the current British, French, American and Chinese Nuclear capabilities were, i know they try to keep them secret, but im more talking about what we do know, or they let us know...becauase i heard that the British no longer use their megaton nuclear bombs now and are infact only using little single kiloton ones instead....

Answer 1

Five "nuclear weapons states" from the NPT
United States5,735/9,960[2]1945 ("Trinity")
Russia (formerly the Soviet Union)7,200/16,000[3]1949 ("RDS-1")
United Kingdom<200[4]1952 ("Hurricane")
France350[5]1960 ("Gerboise Bleue")
China130[6]1964 ("596")
Other known nuclear powers
India40-50[7]1974 ("Smiling Buddha")
Pakistan30-52[8]1998 ("Chagai-I")
Israel75-200[9]none or unknown or 1979 (see Vela Incident)
Abolishing nuclear weapons
North Korea1-10[10]2006[11]

Answer 2

"becauase i heard that the British no longer use their megaton nuclear bombs now and are infact only using little single kiloton ones instead...."

Last I heard the British have never used any form of nuclear weaponry, in fact, nobody ever has except for the US.

Answer 3

Except for what happened when nuclear bombs were dropped in Hiroshima and Nagasaki of Japan, little does the world know the destructive power of the nuclear weapons possessed by the nuclear powers, including the latest additions! How much they have is anybody's guess!

Answer 4

They developed tactical nuclear weapons to use in a battlefield situation but all maintain ballistic weapons capable of destroying large cities as well.

Hopefully we will one day see all nuclear missiles dismantled or rendered useless by our defense programs

Additional Comment:
Any country that live tests a nuclear weapon has used them. Those tests are as much a show of "sabre rattling" as they are functional assessment of those weapons. The "use" of nuclear weapons includes possessing them as a deterrent.