Puerto Rico's dual crises - of debt and Zika - weigh on another problem in the U.S. territory - trash. The island simply does not have enough working landfills. In one area of San Juan, communities discharge raw sewage and garbage directly into the Martin Pena Channel, raising health concerns. When it rains, polluted water from the channel sometimes floods into the homes of thousands of people, increasing fears of spreading the mosquito-born Zika virus that has infected hundreds on the island. At a time when Puerto Rico is struggling under a mountain of debt, the cash-strapped government is looking to Congress to help build adequate sewer systems. The NewsHour's Ivette Feliciano reports Saturday's Signature Segment.