Keeping the 2024 Paris Olympics safe represents a vast undertaking. In advance of the opening ceremonies this Friday, thousands of police officers and spies from many countries are working around the clock to prevent the Games from being marred by terrorism and espionage.

The U.S. intelligence community has discreetly supported Olympic security for decades, and the Paris Games are no exception. The U.S. Diplomatic Security Service also deploys agents and other staff to protect U.S. athletes.