BBC: America's top military officer has said opening up a third front in the Middle East through a strike on Iran would be "extremely stressful" for US forces.
Adm Mike Mullen, chairman of the Joint Chiefs of Staff, was commenting on the likelihood of US or Israeli military action over Iran's nuclear programme.
Tensions have risen amid reports Israel may be planning a possible strike against Iran's nuclear facilities.
Iran denies its nuclear programme is anything other than peaceful.
It has been clear for some time that Adm Mullen does not want to attack Iran, but his latest remarks suggest that he is fighting hard behind the scenes for both the US and Israel to think carefully about the consequences of an attack before considering mounting it.
He said opening up a third front, after Iraq and Afghanistan, would be "extremely stressful, very challenging, with consequences that would be difficult to predict". US Admiral Urges Caution on Iran >>> By Justin Webb | July 2, 2008
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