The jury begins deliberating on Tuesday in the trial of the alleged Boston Marathon bomber – who faces life imprisonment or execution if found guilty.
The prosecution and defence have made their closing statements after weeks of dramatic evidence.
21-year-old Dzhokhar Tsarnaev wanted to “awake the Mujahedeen”, according to Assistant US Attorney Aloke Chakravarty. “He wanted to terrorise this country. He wanted to punish America for what it was doing to his people,” the prosecutor said.
Tsarnaev’s defence attorney Judith Clarke admitted his role in what she called a “senseless act”, but argued he was following his older radicalised brother Tamerlan, the mastermind.
The events of April 2013 have been extensively covered in the trial.
Jurors have seen graphic videos of the aftermath of the bombing and heard harrowing testimony.
As police cornered the two brothers in the following days, the elder Tsarnaev was killed and Dzhokhar captured.
The two blasts close to the marathon finish line killed eight-year-old Martin Richard, Chinese graduate Lingzi Lu, 23, and 29-year-old restaurant manager Krystle Campbell. Hundreds were injured.
Police officer Sean Collier was allegedly killed by the brothers three days later.
Tsarnaev, of Chechen origin, has pleaded not guilty to all 30 charges.