A Massachusetts veteran is planning to spend this Memorial Day remembering his Black Hawk pilot wife, who was killed in Afghanistan less than four months after they were married.

Chris Cullen married his wife Sara in November 2012 after resigning from his Army job last March so that they could be together, MyFoxBoston.com reported.

But on March 11, 2013, “basically, my world stopped,” Cullen told MyFoxBoston.com. Sara was killed in a training mission helicopter crash that also claimed the lives of three others.

“Someone knocked on the door at a time they shouldn’t have been there,” he said. “A million things run through your head, you just kind of shut down,” he told MyFoxBoston.com.

Sara didn’t even get the chance to see their completed wedding photos.

“She was a great American that gave her life for the country, for freedom, for everything the country stands for,” Cullen said.

On Memorial Day, Cullen said he hopes “that everyone can remember that they’re out there, not always able to celebrate the holidays and get to the beach, but that they remember them.”

Cullen will spend the weekend with this family as he continues to heal, MyFoxBoston.com reported.

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