Members of the graduating class of 2015 U.S. Coast Guard Academy throw their hats in the air near the end of their ceremony in New London, Conn., May 20, 2015. (AP Photo/Pablo Martinez Monsivais)

NEW LONDON — The Coast Guard’s mission is as important and relevant as it’s ever been, Homeland Security Secretary Jeh Johnson told the Coast Guard Academy’s Class of 2016.

The secretary gave the keynote address Wednesday to 181 U.S. cadets and five international cadets, who, after 200 weeks of hard work, graduated in a ceremony on Cadet Memorial Field.

"After today, some of you will go to flight school, will process migrants in the Caribbean, will oversee disaster response in the Gulf Coast, or will lead ships into the Arctic," Johnson said. "Your jobs will be difficult and will demand your sacrifice."

The Coast Guard falls under the Department of Homeland Security, the third largest Cabinet department in the federal government.

Today’s homeland security "picture," Johnson said, is "more diffuse and more complicated."

"We live with the prospect of terrorist-inspired attacks as well as terrorist-directed attacks. We live with the threat of homegrown violent extremism that could strike in a number of ways on a number of fronts. Cyberattacks and cyberattackers are becoming more sophisticated. Global warming presents challenges," he continued.

Johnson himself is a Coast…

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