On the morning of September 11, 2001, 91 guests and 79 World employees would perish in the devastating terrorist attack on the twin towers. As the 25th anniversary of that chilling day approaches, CNN Films, Time Studios and Tribeca Studios are set to release Top of the World, a documentary short about the famed restaurant directed by Oscar-nominated filmmakers Julie Cohen and Betsy West. Windows on the World restaurant in 1976Top of the World is a production of CNN Films, Time Studios and Tribeca Studios, in association with Montalto Pictures, and Storyville Films. The film is inspired by the book The Most Spectacular Restaurant in the World by Tom Roston. Watch the trailer for Top of the World above.