If you recently left France, you may have come home with an unexpected souvenir. As part of a training exercise, French police planted plastic explosives in the bag of a real passenger. Then, in typical French competence, they lost track of the bag.

Airport police deliberately placed a bag containing plastic explosives into a passenger's luggage early Friday evening, Bouquin said.

The exercise was designed to test sniffer dogs' abilities. One dog successfully detected the item, but the other did not. Before police got another chance, the bag had been carried off on a conveyor belt going from check-in to planes.

The explosives could have made it onto one of up to 90 flights leaving Charles de Gaulle Airport. Police didn't know the bag's destination and quickly alerted the relevant airlines.