Sun-Times file photo Chicago police are alerting residents to a string of home burglaries by a pair posing as city employees. The men have targeted elderly homeowners a half-dozen times over the past month, police said in a community alert. One of them distracts the homeowner while pretending to be a Chicago Water Department worker or a tree cutter, while the other enters the home and steals jewelry and money. The burglaries happened: About 7:45 p.m. May 21 in the 6500 block of North Springfield; About 8 p.m. May 21 in the 1600 block of West 32nd; About 8:40 p.m. May 21 in the 2100 block of South Tan;