What Is the 'Grey Zone' Border Between the U.S. and Canada?

Name: What Is the 'Grey Zone' Border Between the U.S. and Canada?
Uploaded: 2019-04-08T23:39:39Z
Duration: 2 min 11 s
Channel: National Geographic
Description: 23rd July, 2018 - When the U.S. Border Patrol stopped fishing boats along the border between the U.S. and Canada, it reheated centuries-old tensions between the two countries in the Gulf of Maine.

Published 9 Apr 2019, 00:39 BST