The rebirth of the World Trade Center site is one of the most affirming stories of the 21st century. Nearly a decade later, the site of the worst terrorist attack on U.S. soil is now one of the largest and most complex construction projects on the planet—and PBS’ premier science series NOVA is uniquely equipped to tell the tale of engineering this icon. In a film to commemorate the tenth anniversary of 9/11, NOVA chronicles an uplifting and inherently American story of technology, innovation, and daring.

“If an unfriendly foreign power had attempted to impose on America the mediocre educational performance that exists today, we might well have viewed it as an act of war.” So declared “A Nation at Risk,” the report commissioned by President Reagan in 1983. Anxiety about the quality of our schools has hardly subsided since then; what we forget, however, is that Americans have worried about education since the earliest days of our nation.

“RFK in the Land of Apartheid: A Ripple of Hope” tells the little-known story of Robert Kennedy's 1966 visit to South Africa during the worst years of apartheid. Featuring never before seen archival footage, and interviews in South Africa and the United States, filmmakers Larry Shore and Tami Gold tell the story of Senator Robert Kennedy’s influential June 1966 visit to South Africa during the worst years of Apartheid.

In this episode, Radiolab steers its way through a series of stories about getting lost, and asks how our brains, and our hearts, help us find our way back home.