France has joined other nations in bolstering security at its airports in line with a US request to enhance screening for direct US flights for fear that terrorists could return to their countries

France has joined other nations in bolstering security at its airports in line with a US request to enhance screening for direct US flights for fear that terrorists could return to their countries, aviation officials said Friday.
  
The new measures "will be carried out in a way to limit as much as possible inconvenience to passengers, however delays are possible," the DGAC civil aviation authority said in a statement.
  
A DGAC spokesman told AFP that "we cannot divulge the added measures" that are being taken. Officials recommended passengers catching flights to the United States get to the airport early to undergo the additional screening.
  
The added security will notably be felt at the Charles de Gaulle and Orly airports outside Paris, but also in Nice and Marseille in the south of France.

US authorities have not publicly given a reason for their alarm, but it comes amid fears that hundreds of terrorists travelling from Europe to fight in the Middle East could pose a security risk on their return.