Thirteen men and one woman went on trial in Paris Wednesday, accused of helping jihadist gunmen in three days of attacks in 2015 that began at the offices of the French satirical magazine Charlie Hebdo and ended at a Jewish supermarket.

Seventeen people in all were killed. The three primary gunmen were killed in police raids shortly after the crimes.

Meanwhile, Charlie Hebdo, in a defiant move, republished controversial cartoons of the prophet Mohammed, considered blasphemous to Muslims and thought to have precipitated the original attack on the newspaper.

The trial is expected to last over two-and-a-half months, with plans to hear testimony from some 150 experts and witnesses to one of France’s most difficult chapters in recent years.

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