Last fall, we threw out a simple question after a show about U.S. immigration policies: What do you wish you knew about immigration?

Across the country, listeners responded with hundreds of text messages – from small towns in Iowa, Colorado and Massachusetts to big cities such as Los Angeles, Atlanta and Chicago.

We chose four questions and took our team of reporters and producers to task to answer them.

To figure out the answers, we go deep into immigration court, help one listener uncover her grandfather’s secret past about entering the country and break down the path to legal citizenship. On the way, we meet scam artists, attorneys, asylum seekers and do-gooders learning immigration law for kicks.