(REUTERS/Leonhard Foeger TPX IMAGES OF THE DAY)

(Photo by JOE KLAMAR / AFP)

Da sinistra, Michael Stix, CEO di ProsiebenSat1Puls4, il ministro dei Trasporti austriaco Norbert Hofer, Derrick Xiong, co-fondatore di Ehang e Robert Machtlinger, CEO di Facc Ag (Photo by JOE KLAMAR / AFP)

(Photo by JOE KLAMAR / AFP)

(REUTERS/Leonhard Foeger)

(REUTERS/Leonhard Foeger)

(REUTERS/Leonhard Foeger)

(REUTERS/Leonhard Foeger)

(REUTERS/Leonhard Foeger)

(REUTERS/Leonhard Foeger)

(REUTERS/Leonhard Foeger)

(REUTERS/Leonhard Foeger)

(REUTERS/Leonhard Foeger)

(REUTERS/Leonhard Foeger)

(REUTERS/Leonhard Foeger)

(REUTERS/Leonhard Foeger)

(REUTERS/Leonhard Foeger)

(REUTERS/Leonhard Foeger)

(Photo by JOE KLAMAR / AFP)

(Photo by JOE KLAMAR / AFP)

(Photo by JOE KLAMAR / AFP)

(Photo by JOE KLAMAR / AFP)

(Photo by JOE KLAMAR / AFP)

(Photo by JOE KLAMAR / AFP)