US Air Forces CV-22B Osprey, multi-mission, tiltrotor military aircrafts fly above Kiev in connection with military drills "Fiction Urchin" with the participation of regiments of the Special Operations Forces of Ukraine and the Special Operations Forces of the United States on September 23, 2020. (Photo by Sergei SUPINSKY / AFP)

US Air Forces CV-22B Osprey, multi-mission, tiltrotor military aircrafts fly above Kiev in connection with military drills "Fiction Urchin" with the participation of regiments of the Special Operations Forces of Ukraine and the Special Operations Forces of the United States on September 23, 2020. (Photo by Sergei SUPINSKY / AFP)

US Air Forces CV-22B Osprey, multi-mission, tiltrotor military aircrafts fly above Kiev in connection with military drills "Fiction Urchin" with the participation of regiments of the Special Operations Forces of Ukraine and the Special Operations Forces of the United States on September 23, 2020. (Photo by Sergei SUPINSKY / AFP)

US Air Forces CV-22B Osprey, multi-mission, tiltrotor military aircrafts fly near the Motherland monument in Kiev in connection with military drills "Fiction Urchin" with the participation of regiments of the Special Operations Forces of Ukraine and the Special Operations Forces of the United States on September 23, 2020. (Photo by Genya SAVILOV / AFP)

US Air Forces CV-22B Osprey, multi-mission, tiltrotor military aircrafts fly near the Motherland monument in Kiev in connection with military drills "Fiction Urchin" with the participation of regiments of the Special Operations Forces of Ukraine and the Special Operations Forces of the United States on September 23, 2020. (Photo by Genya SAVILOV / AFP)

US Air Forces CV-22B Osprey, multi-mission, tiltrotor military aircrafts fly in front of the Kiev-Pechersk Lavra in Kiev in connection with military drills "Fiction Urchin" with the participation of regiments of the Special Operations Forces of Ukraine and the Special Operations Forces of the United States on September 23, 2020. (Photo by Genya SAVILOV / AFP)

US Air Forces CV-22B Osprey, multi-mission, tiltrotor military aircrafts fly above Kiev in connection with military drills "Fiction Urchin" with the participation of regiments of the Special Operations Forces of Ukraine and the Special Operations Forces of the United States on September 23, 2020. (Photo by Genya SAVILOV / AFP)

US Air Forces CV-22B Osprey, multi-mission, tiltrotor military aircrafts fly above Kiev in connection with military drills "Fiction Urchin" with the participation of regiments of the Special Operations Forces of Ukraine and the Special Operations Forces of the United States on September 23, 2020. (Photo by Sergei SUPINSKY / AFP)