Ambulance workers, left, fire flares during a rally against changes to working conditions outside the National Assembly in Paris, France, December 3, 2018. Dozens of ambulances blocked the bridge leading to the National Assembly in downtown Paris.

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An ambulance worker looks at burning tires during a rally against changes to working conditions outside the National Assembly in Paris, France, December 3, 2018. Dozens of ambulances blocked the bridge leading to the National Assembly in downtown Paris.

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Ambulance workers rally against changes to working conditions outside the National Assembly in Paris, France, December 3, 2018. Dozens of ambulances blocked the bridge leading to the National Assembly in downtown Paris.

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Ambulance workers rally against changes to their working conditions outside the National Assembly in Paris, France, December 3, 2018. Dozens of ambulances blocked the bridge leading to the National Assembly in downtown Paris.

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An ambulance worker fires a flare during a rally against changes to their working conditions outside the National Assembly in Paris, France, December 3, 2018. Dozens of ambulances blocked the bridge leading to the National Assembly in downtown Paris.

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Dozens of ambulances block the bridge leading to the National Assembly during the rally of ambulance workers against changes to their working conditions in Paris, France, December 3, 2018.

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A trash can burns during the rally of ambulance workers against changes to working conditions in Paris, France, December 3, 2018. Dozens of ambulances blocked the bridge leading to the National Assembly in downtown Paris.

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Firefighters extinguish the fire during the rally of ambulance workers against changes to working conditions outside the National Assembly in Paris, France, December 3, 2018. Dozens of ambulances blocked the bridge leading to the National Assembly in downtown Paris.

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A trash can burns in front of the National Assembly during the rally of ambulance workers against changes to working conditions in Paris, France, December 3, 2018. Dozens of ambulances blocked the bridge leading to the National Assembly in downtown Paris.

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Ambulance workers fire flares during a rally against changes to working conditions outside the National Assembly in Paris, France, December 3, 2018. Dozens of ambulances blocked the bridge leading to the National Assembly in downtown Paris.

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An ambulance worker fires a flare during a rally against changes to working conditions outside the National Assembly in Paris, France, December 3, 2018. Dozens of ambulances blocked the bridge leading to the National Assembly in downtown Paris.

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