Two Colorado Springs firefighters sent to the hospital recently for suspected carbon monoxide poisoning are proof the department needs to update its aging fleet, the local firefighters union says. Three times in a two-week span starting in December, firefighters working on Engine 6 reported feeling sick after suspected exposure to carbon monoxide within the cab of the truck, the Colorado Springs Professional Firefighters IAFF Local 5 President Dave Noblitt said. The Fire Department confirmed the incidents.