Bk 117 - c2 ec - 145 helicopter in the mountains of switzerlandBK 117 - c2 ec - 145 helicopter in the mountains of Switzerland
A russian air force mi-17 helicopter, and a boeing-737 is flying in the backgroundA Russian Air Force Mi-17 helicopter, and a Boeing-737 is flying in the background
An american tiltrotor combining the capabilities of an airplane and a helicopterAn American tiltrotor combining the capabilities of an airplane and a helicopter