Its been a while since I've last watched a really good documentary. The old thread is archived so I thought it would be a good idea to start a new one.
Some of my favorites.
Who killed the electric car (2006) - explores the creation, limited commercialization, and subsequent destruction of the battery electric vehicle in the United States.
cocaine cowboys (2006) - explores the rise of cocaine and resulting crime epidemic that swept the American city of Miami, Florida in the 1970s and 1980s.
Food, Inc. (2008) - examines corporate farming in the United States, concluding that agribusiness produces food that is unhealthy, in a way that is environmentally harmful and abusive of both animals and employees.
Waiting for superman/lottery (2010) - analyzes the failures of American public education by following several students through the educational system, hoping to be selected in a lottery for acceptance into charter schools.
sicko (2007) - investigates problems in health care in the United States, focusing on its health insurance and the pharmaceutical industry greed.
An inconvenient truth (2007) - exposing climate changes/issue of global warming being recognized as a problem worldwide.
and.... Justin Beiber: never say never (2011)