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When Tim King organized a sleep-out in Chicago last year, 300 students from across the Midwest came to raise awareness of homelessness by gathering signatures for a petition, holding up signs and even “sleeping out” on the Magnificent Mile. King, a senior at North Park University in Chicago, is part of a growing network of students at evangelical campuses who are becoming politically active in combating world poverty and hunger, the AIDS epidemic, debt relief, the humanitarian crisis in Sudan and global warming.