Rubio tells G7 US will keep imposing 'devastating' costs on Iran, diplomats say

By John Irish and Simon LewisPARIS, Nov 10 (Reuters) - US Secretary of State Marco Rubio told G7 foreign ministers on Tuesday that the US would keep imposing "devastating" economic costs on Iran, saying it had options beyond war or agreeing to unacceptable Iranian demands, four G7 diplomats said.Rubio's comments came during a meeting in Paris of foreign ministers from…