The twenty-first century is an uncertain time where hostile outside forces--international terrorists, drug traffickers, and rogue states -threaten the North American way of life and the freedoms that we have so long taken for granted. The 15 volumes in this series are about the services and agencies who quietly protect our country and guarantee our liberty. Well-known services, such as the police force, Army, Air Force and Navy are covered, as well as the unsung heroes of the fire department, the rescue services, and the bolder and immigration controls. This series provides an insight into the lives and daily heroisms of the many hundreds of thousands of men and women who work to make North America a safe country, both now and for the future.