Do u think U.S.( George W.Bush) is correct in their external affairs?(nuclear)

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After George W.Bush became the president U.S.,he made war on some countries.He said that they r producing nuclear weapons. But after the war was over he doesnt show any nuclear weapon!!! Eg, IRAQ.But U.S. had most nuclear weapons.Now he blaming Iran,S.Korea Is he means only U.S. can have nuclear weapons not any other countries?Is he thinks U.S has to rule this world? What do u all think my frnds?