Project Veritas co-founder James O'Keefe, left, and Stan Dai leave the St. Bernard Parish jail a taxi cab in Chalmette, La., Tuesday, Jan. 26, 2010. O'Keefe, a conservative activist who posed as a pimp to target the community-organizing group ACORN, was one of four people arrested by the FBI and accused of trying to interfere with phones at Sen. Mary Landrieu's office in New Orleans. On Tuesday, Project Veritas released an undercover video in which a San Francisco teachers union staffer appears to admit to once assaulting a student and covering it up. Photo: Patrick Semansky, ASSOCIATED PRESS