At least 20,000 people have marched through central Paris protesting against the French government's plans to cut jobs in the education sector. The protestors are also unhappy about President Nicolas Sarkozy's plans to force schools to stay open in the event of strike action. Mr Sarkozy was elected a year ago on a platform of reforms, but many of them have provoked stiff opposition. Separately, fishermen angered by rising fuel costs blockaded La Rochelle port.