The French President said businesses must do their part to fight terrorism.
He was speaking a day after the satirical weekly’s publication of a cartoon of the Prophet Mohammad.
The arrests came after Belgian police killed two men who fired on them during one of about a dozen raids.
World leaders linked arms to lead more than a million French citizens through Paris.
The move is a response to France’s action against Islamic State militants in Iraq.
A statement said the target in northeast Iraq was totally destroyed.