Story and Video by Marion Callahan and photos by my talented colleague Michele Haddon. By Marion Callahan Under the weight of a soaked blanket, Megan Cohen inched her way, on foot, along a stretch of Interstate 95 in Philadelphia, the rain beating against her frail body.       She wasn’t looking to be saved. “I was so broken. I was homeless at that point for quite a while and I wasn’t in the right state of mind at all,” said Cohen.