Memorial Day weekend is a day that serves many functions. Of course, its primary purpose is to remember those brave soldiers who have lost their lives in the line of duty. It has also long been considered the official start to summer. However, in certain areas of the U.S. this day is nothing but a reason to lock the doors. This weekend is poised to be the most violent weekend of the year for Chicagoans, which saying a lot for a city nickna...