MEMORANDUM FOR THE SECRETARY OF STATE THE SECRETARY OF DEFENSE THE SECRETARY OF COMMERCE THE SECRETARY OF ENERGY THE SECRETARY OF HOMELAND SECURITY THE DIRECTOR OF THE OFFICE OF MANAGEMENT AND BUDGET THE ASSISTANT TO THE PRESIDENT FOR NATIONAL SECURITY AFFAIRS Â SUBJECT:Â Â Safeguarding U.S. National Interests in the Arctic and Antarctic RegionsTo help protect our national interests in the Arctic and Antarctic regions, and to retain a strong Arctic security presence alongside our allies and partners, the United States requires a ready, capable, and available fleet of polar security icebreakers that is operationally tested and fully deployable by...