Boston Marathon bombing suspect Dzhokhar Tsarnaev pleaded not guilty to all charges as he made his first public appearance since the attacks.
The 19-year-old is charged with 30 crimes and could face the death penalty if he is found guilty of killing three people, including an eight-year-old boy, and wounding more than 260.
Tsarnaev, who appeared in a courtroom filled with bombing victims, was dressed in an orange prison jumpsuit, with his hair long and unruly and his left arm in a cast.
He spoke clearly in court and blew a kiss to his family as he left but did not look at the victims.
A mother, whose two sons both lost a leg in the Boston Marathon bombing, told ITV News she will be at Tsarnaev's trial "every day".
Liz Norden said she will be at court because she "wants to see justice done".
Tsarnaev is accused of assembling homemade pressure-cooker bombs that killed two people at the Boston Marathon and later shooting dead a university police officer.
That shooting and a later gun battle with the police - which led to the death of his older brother Tamerlan - caused a day-long lockdown of most of Boston as they searched for the teenager.
He was eventually found, badly wounded, hiding in a boat.
Prosecutors claim that Tsarnaev, an ethnic Chechen, wrote about his apparent motivations for the attacks on the walls inside the boat where he was captured.
He supposedly wrote the US government was "killing our innocent civilians".
Tsarnaev received cheers from supporters when his motorcade arrived at court today, with some shouting "Justice for Jahar", as he is known.
Shun Tsou, 20, who was part of Tsarnaev's wrestling team, said he was "torn" on his former teammate and added: "There was nothing sketchy about him".