American icons reflect on the ideals the U.S. was founded on

To mark the 250th anniversary of the Declaration of Independence, 60 Minutes invited leaders in the arts, sciences, sports, technology and business to end each broadcast with their "Reflections on America." Here's what they said: Suni Williams What struck astronaut Suni Williams about the view of America from orbit | 60 Minutes 01:46 Astronaut Suni Williams , who spent 608 days in space across three separate missions, shared what struck her about the view of America from orbit. Looking at the Earth from the International Space Station is "just amazing," Williams said. "And I can't help but think about the 250 years of American innovation that got us to that point where we actually can have this view," she said. The view from space prompted Williams to think about where the country will be in the next 250 years. "I think our possibilities are only limited by our imagination," she said. Lonnie Bunch III The Smithsonian secretary's favorite representation of America | 60 Minutes 01:36 As secretary of the Smithsonian, Lonnie Bunch III is in charge of millions of American artifacts. "The great strength of America is the desire to enlarge freedom," says Bunch, who chose Joseph Trammell's Freedom Papers as the artifact that represents that value. Trammell was enslaved in northern Virginia before gaining his freedom in the 1850s, according to Bunch. Everywhere he went, Trammell carried his precious freedom papers, which showed that he was not a slave. …