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May 22, 2013 | 08:02 AM
Washington D.C. weather

Ocean Study

<p>Pacific High School students Jake Kranz and Charlie Skultka take a water sample at Crescent Harbor in Sitka, Alaska on Jan. 18, 2013. The students are part of a team monitoring water acidity in Sitka. (AP Photo/Daily Sitka Sentinel, James Poulson)</p>

Pacific High School students Jake Kranz and Charlie Skultka take a water sample at Crescent Harbor in Sitka, Alaska on Jan. 18, 2013. The students are part of a team monitoring water acidity in Sitka. (AP Photo/Daily Sitka Sentinel, James Poulson)