Host Ira Glass talks with sailor and researcher Captain Charles Moore about a gigantic area in the middle of the Pacific Ocean, as far away from land as you can get, that is filling with plastic trash. There are five spots like this on the world's oceans.

Alex Blumberg talks with sailor Prevon Scott, who stocks vending machines on the Stennis.

Host Ira Glass joins a group of tourists to walk through the captured German submarine that's on permanent display at Chicago's Museum of Science and Industry. He notes that the Museum chooses to underplay the murderous Nazi origins of the boat.

When Anh Tuan Hoang was 12 and living in Vietnam back in 1980, his cousin was scheming up a way to escape the country by boat. Anh Tuan was invited too.