First lady Michelle Obama worked out with trainers from "The Biggest Loser" at the White House as part of her national Let's Move! initiative. Take a look at other Presidential first ladies and the causes they have supported.
As testament to Lady Bird Johnson's environmental ardor, a grove of skyscraper-esque trees in Redwood National Park bears her name. During her husband's time in office, she fully embraced nature and sponsored the Highway Beautification Act.