Rep. Robert Pittenger, R-N.C., is vice chairman of the House Financial Services Committee’s Task Force on Terrorism Financing, which has been investigating ways of improving U.S. efforts to choke off the flow of money to international terrorist groups.

It’s a huge problem, part of what’s estimated to be a global flow of $600 billion to $1.5 trillion in laundering of illicit funds worldwide, and one that many experts expect will get worse once Iranian banks sanctioned for engaging in the practice are brought back into the international financial system as a result of the July 14 nuclear deal.