U.S. Financial Warfare (1:03)

Guest: Juan Zarate, Former Assistant Treasury Secretary and Deputy National Security Adviser  Some of the most powerful weapons the United States has to fight terrorists and keep rogue regimes in line comes not from the Department of Defense, but from the US Treasury Department. Bad guys need money to do bad things. So, in the days after 9/11, the United States unleashed a batter of tactics aimed at tracking Al Qaeda’s financial footprints and freezing it out of the financial system. These same weapons are now being used on ISIS. They were also key in convincing Iran to dismantle its nuclear program.