Just like Michelle Obama and her secret shopping trips, Chelsea Clinton and mom Hillary also occasionally escaped the White House. The former first daughter described their jaunts in a PSA she recently filmed for the Trust for the National Mall. "We would put on hats and sneak out for walks on the Mall," the younger Clinton said. (The partygoers at this weekend's Ball on the Mall were given a sneak peek of the forthcoming PSA.) Clinton also noted that her dad's two inaugurations rank high on her list of National Mall moments, along with the first time she encountered the Vietnam Women's Memorial.