Tom Gjelten's new book marks the 50th anniversary of the 1965 immigration law.
That law, the NPR correspondent says, is responsible for changing the character and identity of the United States, and forced us to define what American exceptionalism really means.
Gjelten's book is titled "A Nation of Nations: A Great American Immigration Story."
He was a featured speaker at an Oct. 3, 2015, event moderated by The Boston Globe's Marcela Garcia. The event was held at the JFK Presidential Library in Boston.
Thanks to WBUR for recording the conversation.