Boston Marathon bomber Dzhokhar Tsarnaev was sentenced to death by a jury on Friday for helping carry out the 2013 attack, which killed three people and wounded 264 in the crowds at the race's finish line.
After deliberating for 15 hours, the federal jury chose death by lethal injection for Tsarnaev, 21, over its only other option: life in prison without possibility of release.
The jury had found Tsarnaev guilty last month of placing a pair of homemade pressure-cooker bombs on April 15, 2013, as well as fatally shooting a policeman. The bombing was one of the highest-profile attacks on U.S. soil since Sept. 11, 2001.