Prince Albert II of Monaco and Swiss pilot Raphael Domjan take off onboard the "Pipistrel Velis Electro" plane, a light two-seater single-engine electric aircraft, at Nice's airport in the French riviera city of Nice, on September 14, 2021. - Prince Albert II of Monaco made a flight in Nice on September 14, 2021, in an electric plane piloted by the Swiss Raphael Domjan, founder of the SolarStratos project. They made a return flight between Nice airport and Monaco which lasted around thirty minutes. The aircraft has a flight range of 1 hour. (Photo by Valery HACHE / AFP)