USPS: EVERY DAY HEROES

From USPS.com :
EVERY DAY HEROES. Letter carriers are on the street in every community in America every day. They’re often first to sight a fire, a lost child, an accident, a crime or other situation. Through daily deliveries, carriers become familiar with the communities they serve and can notice changes in routine that might spell trouble. When recognized for their efforts, they’re most often humble. “They don't think they've done anything out of the ordinary, yet they are heroes,” says Postmaster General Jack Potter. “We take a lot of pride in our citizenship.”