The most provocative works in this 25-person group show are by LA screenwriter and conceptual artist Sean Sorensen. He’s fashioned what looks like a response to the post-9/11 question “Why do they hate us?”: a line of burkas made of fabric covered with, among other things, U.S. currency, the American flag, and the logos of Shell, Starbucks, and the Chicago Cubs. Acknowledging the ambivalent reception American pop culture gets abroad–and of how much the export of irony is resisted by foreign fundamentalists–Sorensen flouts Muslim propriety by covering one burka with voluptuous Marilyn Monroes. But he’s happy to upset Christians too, desecrating an icon of Western art, Leonardo da Vinci’s Last Supper: his takeoff, The Last Suckers, shows a white-robed Osama bin Laden seated in the center of a jumbo jet with the 9/11 hijackers flanking him like disciples. Aron Packer Gallery, 118 N. Peoria, through August 23. Hours are 10:30 to 5:30 Tuesday through Saturday; 312-226-8984.