July 18, 2012 10:22 am Sergio Knows Why Your Diet Isn't Working NBC’s fitness guru diagnoses what could be stopping your plans progress. Local 1:49 Suspect in murder of fallen CPD officer Luis Huesca taken into custody 0:51 4 Chicago restaurants named among best brunch spots in the US by OpenTable 2:07 A look at top small businesses in Chicago for Small Business Month 2:16 Chicago Sky star Angel Reese speaks on preseason, confidence with NBC Chicago's Mike Berman 2:16 Chicago City Council weighing a change to speed limits on city streets