ONCE MORE TO THE SKY: The Rebuilding of the World Trade Center

The story of a masterpiece--all 1,776 feet. In late 2014, One World Trade Center--or the Freedom Tower-opened for business. It took nearly 10 years, cost roughly four billion dollars, and it suffered many setbacks. And yet it ultimately got built and it is a reminder of what America is capable of when we put our differences aside. Includes more than 100 photos.