Workers across France are taking part in a nationwide strike against a new youth jobs law, causing flight cancellations and snarling commuter train traffic.
Thousands are expected to take to the streets in about 200 protests throughout the country, or just stay home.
And police are stepping up surveillance on the rail network to prevent the kind of violence produced by previous demonstrations.
The new youth employment law would let companies fire workers under 26 without cause during their first two years on the job.
The government hopes the law will make employers more willing to hire younger workers and reduce the nation's soaring youth unemployment rate.
Critics claim it'll eat into job protections and leave young workers even more vulnerable.
Labor and student groups say there'll be more strikes and protests unless the government cancels the new law.