Behind the badge: answering the call to serve on America's homefront

Part I: Answering the call. Ordinary guy, extraordinary circumstances / Clay Headrick, firefighter ; The choice to serve / Keith Dempsey, firefighter ; Police of the woods and water / Jeremy Judd, game warden

Part 2: Enduring the trauma. Family of service / Katelyn Kotfila, deputy ; The confidence of camaraderie / Tommy Wehrle, swat snipper ; The catch-22 of police work / Justin Heflin, sergeant

Part 3: Duty of discernment. The watchdog / Vincent Vargas, border patrol ; Do unto others / Steve Hennigan, LAPD ; America's sheriff, Mark Lamb.