In what has become an annual tradition, volunteers join Paul Monti, whose son died while serving in Afghanistan, to plant flags at each gravestone at the Massachusetts National Cemetery.
Author John Steele Gordon looks at the role air conditioning played in the South becoming a political powerhouse — especially a Republican powerhouse. Thanks to AC and desegregation, Gordon writes, the South was able to develop. People wanted to live there — companies wanted to move there.
Peter O’Dowd follows the route of Abraham Lincoln's funeral train 150 years ago, to look at modern-day race relations and Lincoln's legacy.