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By Janet McBride+ B7 o1 I+ ?. u
4 L* P& w8 w, p# j5 N- \LONDON (Reuters) - Oil rose towards $70 on Wednesday as U.S. warships put on a show of force off Iran's coast, coinciding with a United Nations agency report that said the Islamic republic had expanded its nuclear programme.; z6 G$ ?+ N$ _5 z. V, U1 @- l* x