Specialist Robert Bacon knew what lay ahead of him and found it hard to keep his nerve. Not because he might have to wrestle an unruly prisoner into Iraqatraz - the solitary confinement wing of the POW camp his unit oversaw. And not because of hostility and weapons lurking around every corner. After what the Military Police member had been through since January 2003, an unlikely thing wracked his nerves as he stood in the principal's office Wednesday morning - meeting second-grader Hallie McQueeny. Bacon, of Bensenville, a member of the 822nd Military Police reserve unit, had kept McQueeny's letter...