Iran\'s new President Hassan Rowhani on Tuesday warned world powers that the timeframe for resolving a showdown with Tehran over its disputed nuclear ambitions is not unlimited. \"The period of time for resolving the nuclear issue will not be limitless,\" Rowhani said in an interview broadcast live on state television. \"The world should take advantage of this period and the opportunity that our nation created in (my) election,\" the moderate leader said, referring to his June 14 election to succeed hardline predecessor Mahmoud Ahmadinejad.