They're desperate to get out of Central America and enter the U.S. -- undocumented immigrants seeking a better life for themselves and their families. They show up on the nightly news in political battles about where to house them and whether to send them home. But a Takoma Park photographer wanted to show the human stories behind the headlines. So she hopped trains with the migrants and rode north, photographing their perilous journeys. She joins us to describe the faces and landscapes her pictures portray.