Trump's administration said it won't lift the Jones Act restrictions as there are enough U.S. ships to help Puerto Rico. While previous presidents have lifted the restrictions following natural disasters, “the situation in Puerto Rico is much different,” said Gregory Moore, a spokesman for U.S. Customs and Border Protection.

As giant ships navigate through the widened Panama canal, Houston is ready for them.

Kai Ryssdal talks to New York Times reporter Ian Urbina about his investigative series.