WikiLeaks founder Julian Assange’s extradition case started in a London court on Monday.

On the first day of the trial at the Woolwich Court near Belmarsh Prison, where he was detained, Assange spoke only to confirm his name and date of birth.

At the hearing watched by Assange’s father, John Shipton, and some of his supporters, the U.S. defense was first heard.

Assange “put lives at risk” by disseminating classified materials through WikiLeaks, said James Lewis, a lawyer representing the U.S. on the first day of extradition hearings.

Lewis also said that journalism cannot be an excuse for breaking the law or criminal

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