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Yoon S. Byun/Globe Staff
Harold Roy, a security officer at Massachusetts General Hospital, is working to rebuild his family's homeland of Haiti.
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Yoon S. Byun/Globe Staff
Roy (left) was at the airport preparing to board a plane for Miami when the earthquake struck in 2010.
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Yoon S. Byun/Globe Staff
Roy (center) became certified to teach CPR to security workers in Haiti as part of his work through the Thomas S. Durant Fellowship for Refugee Medicine.
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Yoon S. Byun/Globe Staff
The Boston resident (not pictured) also taught security techniques and courses on how to manage aggressive behavior.
