A handout photo made available by the US Air National Guard shows a US Army helicopter (C, back) with USAF (United States Air Force) Air Demonstration Squadron Thunderbirds amid pyrotechnics simulation during the 2019 Sioux Falls Airshow, in Sioux Falls, South Dakota, USA, 18 August 2019 (issued 21 August 2019).
The Thunderbirds along with other aerobatic acts wowed the thousands of people who attended the show.
Photo: EPA-EFE/TECH. SGT. DUANE DUIMSTRA/US NATIONAL GUARD HANDOUT