A formation of the Thunderbirds and Blue Angels fly over New York City, the United States, on April 28, 2020. The U.S. Air Force Thunderbirds and the U.S. Navy Blue Angels honored frontline COVID-19 responders and essential workers with formation flights over New York City, Newark, Trenton and Philadelphia on Tuesday. (Photo: China News Service/Liao Pan)
A formation of the Thunderbirds and Blue Angels fly over New York City, the United States, on April 28, 2020. The U.S. Air Force Thunderbirds and the U.S. Navy Blue Angels honored frontline COVID-19 responders and essential workers with formation flights over New York City, Newark, Trenton and Philadelphia on Tuesday. (Photo: China News Service/Liao Pan)
A formation of the Thunderbirds and Blue Angels fly over New York City, the United States, on April 28, 2020. The U.S. Air Force Thunderbirds and the U.S. Navy Blue Angels honored frontline COVID-19 responders and essential workers with formation flights over New York City, Newark, Trenton and Philadelphia on Tuesday. (Photo: China News Service/Liao Pan)
A formation of the Thunderbirds and Blue Angels fly over New York City, the United States, on April 28, 2020. The U.S. Air Force Thunderbirds and the U.S. Navy Blue Angels honored frontline COVID-19 responders and essential workers with formation flights over New York City, Newark, Trenton and Philadelphia on Tuesday. (Photo: China News Service/Liao Pan)