Tamerlan Tsarnaev, one of the Boston Marathon bombing suspects, was the subject of an April 2009 photo essay that appeared in a graduate school magazine at Boston University. According to the article, he had hoped to become a naturalized American and make the U.S. Olympic boxing team. Authorities say an overnight shootout with police left him dead on April 19, 2013. Barcroft Media/Landov
Tsarnaev answers a call while walking to boxing practice at the Wai Kru Mixed Martial Arts center in Boston. Barcroft Media/Landov
Tsarnaev practices boxing at the Wai Kru Mixed Martial Arts center. Barcroft Media/Landov
Tsarnaev shows how he strengthens his ankles, according to the photo essay. The photographer did not want to be named for this story. Barcroft Media/Landov
Though he had lived in the United States for five years, Tsarnaev said in the essay: "I don't have a single American friend. I don't understand them." Barcroft Media/Landov
Tsarnaev works out. Barcroft Media/Landov
Tsarnaev stretches during boxing practice. Barcroft Media/Landov
Tsarnaev tapes up his hand. Barcroft Media/Landov