Currently, the US and Western allies' major campaign in the Middle East is fighting the Islamic State while ignoring to address Iran's military engagements in other countries, ignoring Tehran's determination for regional supremacy seriously.
There have been rumors about Khamenei's health conditions for several years. Nevertheless, in the last few weeks, more and more images of Iran's Supreme Leader are emerging, reflecting his fragile and weak physical condition.
Countering ISIS is the common goal of two old adversaries, the US and Iran. Both are increasingly worried about ISIS' rapid progress in Iraq as it plows through towns and cities in northern and western Iraq. Still, it appears they cannot find a way to cooperate.