WASHINGTON (AP) — The National Museum of African American History and Culture opening this weekend in Washington took more than a decade to build. The idea for museum and memorial traces back to 1915 and a group of African-American Civil War veterans. Officials unveil six design concepts proposed for the future museum. The design is inspired by an African headdress, and a bronze screen that wraps the building taking inspiration from metalwork in the South. The museum announces it will receive about 40 objects connected to abolitionist and Underground Railroad conductor Harriet Tubman, including Tubman's favorite hymnal and a shawl given to her by Queen Victoria. President Barack Obama helps break ground for the museum, calling it "not just a record of tragedy, but a celebration of life." Other major donors with recognizable names include: the Bill & Melinda Gates Foundation; TV producer and writer Shonda Rhimes of "Grey's Anatomy" and "Scandal" fame, and philanthropist David M.