Ever since Texas became a state, the Rio Grande has been the border between the U.S. and Mexico. But rivers can move — and that's exactly what happened in 1864, when torrential rains caused it to jump its banks and go south. Suddenly the border was a different place, and Texas had gained 700 acres of land called the Chamizal, named after a plant that grew in the area.

The Chamizal was a thorn in the side of U.S.-Mexico relations for a century, until Sept. 25, 1964, when the U.S. finally gave part of the land back to Mexico. But by that time, roughly 5,000 people had moved to the area and made it their home. This is their story.

This week we're featuring a story we loved from the StoryCorps podcast.

In 1964, a 12-year-old paperboy from suburban Long Island spent nearly two weeks hiding among the gleaming attractions of the New York World's Fair. His adventure caused a media sensation. But the world only learned half the story.

Hart Island is America’s largest public cemetery—sometimes known as a “potter’s field.” The island has no headstones or plaques, just numbered markers. More than a million people are buried on Hart Island in mass graves, there are no headstones or plaques, just numbered markers. In this special, hour-long episode we're untangling mysteries about how people ended up on Hart Island, the lives they lived and the people they left behind.