I believe it was in 1965 the U.S. sent a Coast Guard to sail through the Vil'kitskii Straits, which is one of these choke points, and the Soviet embassy in Washington warned that the Soviet Union would “go all the way” to stop the voyage. The United States very wisely ordered the icebreaker to turn around and come home.
No, there's been no challenge, but Russia on the legal issue is, again, a supporter of Canada. We have never made anything of that. I know that Mr. Kessel, who testified in front of you, did have some discussions with his counterpart in Moscow prior to 2014, but I don't think anything is happening there right now.