. >> ifill: joyce bailey's legacy turned out to be worth more than money.e trove from the museum she created, the harlem institute of fashion: costumes-- dresses sewn and worn by slaves, celebrities and by civil rights icons. >> one of the things i think people are surprised to know, or to remember, is that rosa parks was a seamstress. >> yes she was. she was actually carrying the dress that the museum now has, on the day that she was arrested. it's a beautiful yellow with brown stripes in it. and it's really beyond belief. you really just have to see it. >> ifill: beginning this weekend, thousands of people will stream into the brand new national museum of african american history and culture to see elements of bailey's collection and countless other priceless artifacts. there is this-- an airplane flown cross-country to the museum, once piloted by the all- black tuskegee airmen; the casket of 14-year-old emmett till, lynched in 1955 for whistling at a white woman; the writings of abolitionist frederick douglass; shackles discovered on a sunken slave ship