I'm not politicizing anything, but I thought you dog lovers may be interested to read an account of a working dog being used at the very limits of that species' ability as in invaluable tool in the fight to protect our country:
http://www.nytimes.com/2011/05/05/science/05dog.html?_r=1&scp=1&sq=seal dog&st=cse
http://www.nytimes.com/2011/05/05/science/05dog.html?_r=1&scp=1&sq=seal dog&st=cse