Arjen Kamphuis was a Dutch cybersecurity expert who, some say, worked closely with Julian Assange. He was last seen on Aug 20, when he checked out of a hotel in northern Norway. On Aug 30, his cell phones were turned on briefly, 1000 miles away, in southern Norway. And last week, his kayak with some personal belongings, including ID, were picked up by a fisherman in the North Sea.