PARIS — French President Francois Hollande is honoring 17 victims killed in Islamic extremist attacks on satirical newspaper Charlie Hebdo, a kosher market and police a year ago this week, unveiling plaques around Paris marking violence that ushered in a tumultuous year.

The ceremonies today come as Charlie Hebdo is releasing a special anniversary issue laced with obscene and offensive cartoons, its surviving artists and columnists vaunting their freedom to lampoon everyone from Muslim fundamentalists to children, politicians and Catholic priests.

Families of victims joined Hollande and other dignitaries near the building where Charlie Hebdo staff were holding an editorial meeting when two heavily armed brothers stormed in Jan. 7, 2015, killing 11 people. The plaque begins: “To the memory of victims of the terrorist attack against freedom of expression.”

They then paid homage to a police officer killed as he tried to chase down the fleeing gunmen. Spraypainted on the sidewalk was a message of support for the Muslim officer, reading “Je suis Ahmed,” or “I am Ahmed,” in the red, white and blue of the French flag.

After the attacks, people around the world embraced the expression “Je suis Charlie” to express solidarity with the slain journalists, targeted for the paper’s caricatures of the Prophet Muhammad.