O Sena

The Vélodrome d'Hiver (French pronunciation: ​[velɔdʁɔm divɛʁ], Winter Velodrome), colloquially Vel' d'Hiv', was an indoor bicycle racing cycle track and stadium (velodrome) on rue Nélaton, not far from the Eiffel Tower in Paris. As well as a cycling track, it was used for ice hockey, wrestling, boxing, roller-skating, circuses, bullfighting, spectaculars, and demonstrations.

The Direction de la Surveillance du Territoire (DST; English: Directorate of Territorial Surveillance) was a directorate of the French National Police operating as a domestic intelligence agency. It was responsible for counterespionage, counterterrorism and more generally the security of France against foreign threats and interference.

Bir-Hakeim ([biʁakɛm]) is an elevated station of the Paris Métro serving line 6 in the Boulevard de Grenelle in the 15th arrondissement. It is situated on the left bank of the Bir-Hakeim bridge over the Seine. The name of both the bridge and the station commemorates the World War II battle of Bir Hakeim.

Gare du Champ de Mars (or Champ de Mars – Tour Eiffel) is a railway station in Paris. The site has accommodated a total of five stations, the last of which in service for Paris' RER.The station was originally built to receive goods necessary for the construction of the pavilions for the Exposition Universelle held in Paris in 1867, 1878, 1889, 1900 and 1937.