US President Joe Biden rides his bike followed by a Secret Service agent in Delaware (Manuel Balce Ceneta/AP)
The highly confidential movements of US President Joe Biden, presidential rivals Donald Trump and Kamala Harris and other world leaders can be easily tracked online through a fitness app that their bodyguards use, an investigation by French newspaper Le Monde found.
But the US Secret Service told the newspaper that it does not believe the protection it provides was in any way compromised.
