With Iran's supreme leader skeptical of reaching a nuclear deal with the United States, former Israeli officials doubt the wisdom of Israel striking Iranian facilities without US buy-in.

Araqchi said Iran would view Washington as a “participant” in any such attack, and Tehran would have to adopt “special measures” to protect its nuclear sites and material

Natasha Hall, Senior Fellow With the Middle East Program at the Center for Strategic and International Studies, discusses the US and Iran concluding their fifth round of nuclear talks with no agreement made,