Secretary of State John Kerry will make remarks at the National Geographic Society during the Ross Sea Conservation Reception on Monday, March 18. More: http://www.state.gov/r/pa/prs/ps/2013/03/206320.htm

In the photo, a jigsaw puzzle of floating ice extends as far as you can see in the Ross Sea, Antarctica, 2006. [John B. Weller photo, courtesy of The Pew Charitable Trusts]