More than seven months after Hurricane Maria devastated the U.S. territory of Puerto Rico, more than 100,000 Americans are still without power, as part of the worst blackout in U.S. history. FRONTLINE and NPR investigate how the federal response in Puerto Rico left millions of Americans in the dark for months - and the storm before the storm: how Wall Street, Puerto Rico's government, and Washington fueled a debt crisis that left the island's economy in ruins and its infrastructure crippled even before Maria hit. The investigative team uncovered a trove of insider ...