See here. TEL AVIV - The Obama administration is considering using maritime levers to ratchet up pressure on Iran, from a modest expansion of existing international interdiction initiatives to the more extreme or less likely blockade of the Arabian Sea mouth and the Gulf of Aden. Implemented unilaterally or as part of an upcoming United Nations Security Council Resolution, such moves would complement the diplomatic drive to roll back Iran's nuclear program through sanctions. A senior U.S. government official said Washington was not willing to consider - "at least at this stage" - what he termed "tripwire-type military challenges" to Tehran. Nevertheless, he confirmed that U.S.-proposed sanctions are likely to expand maneuvering room to board, inspect and interdict shipping to and from Iran.