Nina Chanel Abney’s electrifying new paintings take gun violence, racial conflict, and protests turned violent as subject matter. Their dynamic jumble of forms echoes the constant stream of alarming news supplied 24/7 by the media. (Nina Chanel Abney is showing new work at Jack Shainman Gallery’s 20th Street location through Dec 20th and Mary Boone Gallery’s 24th Street location through Dec 22nd).