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By Janet McBride4 l1 ^. S, \$ V- J
) k# z% F& V5 E: w. kLONDON (Reuters) - Oil rose towards $70 on Wednesday as U.S. warships put on a show of force off Iran's coast, coinciding with a United Nations agency report that said the Islamic republic had expanded its nuclear programme.9 k& A, x5 P& E7 [