Although Antarctica is, by treaty, not a sovereign nation, scientists still have to obey the rules of their home country and the other countries they pass through on their way. While in Christchurch, ANSMET scientists get outfitted in cold weather clothing, and before they get on the plane southward they go through a quick check for possible illicit substances, in this case under the watchful nose of Sam. He's obviously fascinated by my two black labs at home. Good Puppy! Down Boy!