NOVA returns to Ground Zero to witness the final chapter in an epic story of engineering, innovation, and the perseverance of the human spirit. Ground Zero Supertower examines the new skyscraper, One World Trade Center, rising up 104 stories and 1,776 feet from the site where the Twin Towers once stood. NOVA also goes underground to see another engineering marvel taking shape here: the construction of the National September 11 Memorial Museum that will house almost a thousand artifacts from that devastating day. In this update of NOVA’s Emmy-nominated special Engineering Ground Zero, which featured extraordinary behind-the-scenes access to the struggles of the engineers and architects working at 1 WTC and the 9/11 Memorial, NOVA goes inside the construction of the tower’s final floors and the installation of its soaring, 408-foot spire and beacon. The greatest test is still to come, though: Will One World Trade Center, a multi-billion dollar supertower, live up to its promise to be safe, beautiful and ahead of its time?