A Freedom of Information Act request from the Chicago Sun-Times asked the Chicago Transit Authority for the video recording of an Aug. 1, 2017, incident where someone pushed a customer off the subway platform at the Blue Line’s Washington station. Rejecting the demand, the CTA invoked Sec. 7(1)(v) of FOIA, which required proof — by clear and convincing evidence — that disclosing the video “could reasonably be expected to jeopardize the effectiveness” of anti-terrorism security measures. 5 ILCS 140/7(1)(v).Both sides …