Dzhokhar Tsarnaev is a Chechen-American who, along with his brother, was responsible for the Boston Marathon bombing on April 15, 2013. The attack killed three people and injured hundreds, making it one of the deadliest terrorist acts in the United States in recent years. Tsarnaev was 19 years old at the time of the bombing. After a manhunt, Tsarnaev was captured and later tried in federal court. In 2015, he was sentenced to death for his role in the attack. His case has sparked discussions about terrorism, justice, and the implications of the death penalty in the U.S.