What's it like to be kidnapped and tortured by your own government? Ask Hector Aristizábal. He and his brother were taken from their home in Colombia in 1982 by soldiers who beat, electrocuted and nearly drowned them. "NIGHTWIND," Aristizábal's solo stage performance Thurs., SEPT. 6, tells the story of the atrocities he suffered. The performance is part therapy, part education and part call to action: Aristizábal is active in the ongoing effort pressuring the United States to close the Western Hemisphere Institute for Security Cooperation, the U.S. military facility near Columbus, Ga., where many of Colombia's government torturers honed their brutal craft. For more on Aristizábal, see Arts, p. 40. $5. 7:30 p.m. Lupton Auditorium, Oglethorpe University, 4484 Peachtree Road. 404-261-1441. www.oglethorpe.edu/arts/theatre.