Electric air-taxi maker Archer Aviation has accused rival Joby Aviation of hiding ties to China and defrauding the U.S. government to gain an unfair competitive advantage, according to a countersuit filed Monday in federal court.

A 10-minute air taxi flight in Shanghai, China - ed., will cost 59 yuan (about $8.3) in the future.

Spectators could fly through the Los Angeles skies and escape the city's notorious traffic during the 2028 Olympic Games if the organisers have their way.