I have added and linked three recent publications to the References Page.

Two from Ronald O’Rourke and the Congressional Research Service:

• “Changes in the Arctic: Background and Issues for Congress” (pdf) Congressional Research Service, Ronald O’Rourke, Coordinator, Specialist in Naval Affairs, March 28, 2013
• “Coast Guard Polar Icebreaker Modernization: Background and Issues for Congress,”Congressional Research Service, Ronald O’Rourke, Specialist in Naval Affairs, March 15, 2013

And one from the JCS:

• Joint Publication 1, Doctrine for the Armed Forces of the United States, March 25, 2013