One Iranian EMP nuclear bomb can knock out the Saudi and American defenses in Saudi Arabia, said Langfan.
An EMP, or electro-magnetic pulse bomb, explodes at high altitude, knocking out the electric grid of a large area and rendering computers and other electronics useless.
Langfan predicted that the EMP nuke could put the Iran in control of the Shiite-majority areas of eastern Saudi Arabia where almost 100% of Saudi oil is located.
He also drove home the fact that most of the world's oil reserves are located within the so-called "black gold triangle" which Iran can turn into a Shiite Caliphate.
On last week's The Watchman, Langfan explained that a Palestinian Authority state would render Israel defenseless.
Earlier today, a BBC report claimed Saudi Arabia had arranged to obtain nuclear weapons from Pakistan in the event Iran passes the nuclear threshold. It comes as Gulf state's confidence in US efforts to prevent Tehran from developing a nuclear weapons program - along with relations between Riyadh and Washington - are at an all-time low.
Previous articles by Mark Langfan's on the subject of Iran's EMP potential in Arutz Sheva: