History Has Been Growing on Pennsylvania Avenue for a Long Time

The White House grounds have seen a lot of history: weddings, parties, and discussions with foreign leaders have all taken place there. The history of the grounds is as storied as the history of the house's inhabitants. Guest: Marta McDowell, gardener and author of "All the Presidents' Gardens: Madison's Cabbages to Kennedy's Roses, How the White House Grounds Have Grown with America"