The U.S. is escalating the economic war on Iran. Will it work?

After nearly six months of war, Washington is turning to what it calls its "single greatest financial offensive ever." Under Operation Economic Outcast, the US is targeting Iran's economic lifelines, and warning its trading partners they could face sanctions too. Will sanctions force Tehran to back down? Or will they push Iran's trading partners to resist Washington's pressure? And what does this economic offensive reveal about where the war is heading?