Historian, writer and social activist Howard Zinn, author of "A People's History of the United States," will speak about illegal immigration and other issues at the University of Colorado at Boulder. CU-Boulder's Cultural Events Board is sponsoring the talk, which will take place at 7 p.m. Nov. 30 in the Glenn Miller Ballroom at the University Memorial Center. The event "Who You Callin' an Alien, Pilgrim?" is free and open to the public.