In a celebration of both Black History Month and more than 100 days without a Rogers Park shooting, CeaseFire plans to host a panel of professors and former gang members at Mayne Stage, 1328 W. Morse Ave., from 6 to 8 p.m. Feb. 27. An abridged version of the "The Interrupters," a documentary film about CeaseFire's efforts to stem gang violence in Chicago, will be shown. Organizers say Ald. Joe Moore (49th) plans to attend.