Chicago Marathon officials are blaming a malfunctioning antenna for the inadvertent disqualification of several runners' times from Sunday's race. The antenna was connected to the mat located at the 15 km (9.3 mile) checkpoint, one of 11 on the course. Runners are required to register times at the checkpoints so as to weed out those who might be tempted to literally cut corners on the course; two or more misses will DQ you. Around 4,000 of the 35,000 participants didn't have a time recorded at the 15 km mat; 56 runners have had their times reinstated stemming from the malfunction. If you believe your result was unfairly disqualified, you can contact the Chicago Marathon folks at their website, via email - office(at)chicagomarathon.com, or via phone at 312-904-9800. more ›

Check out this unique bird's eye view of 2009 Chicago Marathon runners at the 4.5 mile mark. more ›