Wiith the retirement of two familiar faces, Aurora Fire Rescue will lose more than 80 years of firefighting experience at the end of month. And it’s not just the knowledge Capt. Mike Ackman and Capt. Clint Mitchell picked up during their decades spent on the line, training or managing fire crews that Aurora firefighters will say goodbye to this month. It’s also the decades of wisdom the pair of second-generation firefighters picked up from their fathers — Battalion Chief George Ackman and Lt. A.W. Mitchell — who also spent decades in the city’s fire service. As the pair of second generation firefighters look toward life outside the fire service, they both say it’s not the stress of pulling up to a burning house or the rush of saving someone’s life that they’ll miss most.