A "Fasten Your Seatbelt" and "No Smoking" sign is pictured in a Swiss Air Force Twin Otter aircraft in...
A "Fasten Your Seatbelt" and "No Smoking" sign is pictured in a Swiss Air Force Twin Otter aircraft in Belp near Bern, Switzerland, May 17, 2017. Picture taken May 17, 2017. REUTERS/Denis Balibouse