It was directed by Tristan Patterson and won the best documentary prize at the 2011 South by Southwest Film Festival.
The documentary prizes went to Cover Up.
In March 2005, Stealing a Nation was awarded Britain's most prestigious documentary prize, the Royal Television Society Award.
There are also 10 films competing for the documentary prize, including "Beyond Tara: The Extraordinary Life of Hattie McDaniel."
A documentary prize also went to "Earth and the American Dream," about the destruction of the nation's environment).
Saving Face won the best documentary prize at the 2012 SAARC Film Awards.
"Unzipped," which shared the documentary prize, is Douglas Keeve's breezy and insightful look at the fashion world, with the designer Isaac Mizrahi as an irrepressible tour guide.
Street artist scoops most entertaining documentary prize at Grierson Trust British Documentary Awards.
The group's documentary prize went to Jennie Livingston's "Paris Is Burning," which explores the competitive world of transvestite voguing and regards it as a reflection of society at large.
But then, the hourlong "Target" took best documentary prizes at the SXSW and Slamdance film festivals, which piqued the interest of HBO, which owns Cinemax.