Man's best friend may also be his very best coworker, as shown in this illustrated book of dogs in action. Among the 50 dogs profiled and shown in color photographs, here are the Homeland Security dogs that keep passengers safe at Washington Dulles International Airport; search-and-rescue K-9 teams that are ready for anything at the scene of natural disasters, accidents, and the worst terrorist strike in recorded history; and the Lutheran Church Charities K-9 Comfort Dogs, consoling the survivors of the Boston Marathon bombing and Superstorm Sandy.