0 \2 T/ b9 h! k: E, J/ s6 JLONDON (Reuters) - Oil rose towards $70 on Wednesday as U.S. warships put on a show of force off Iran's coast, coinciding with a United Nations agency report that said the Islamic republic had expanded its nuclear programme. # a6 m% H" a3 M$ E7 q$ r: `1 \/ U7 a