Aircrafts fly over the Santa Lucia military airbase during the Aerospace Fair 2019 in Tecamac, Mexico, on April 27, 2019. (Xinhua/Xin Yuewei)

Aircrafts fly over the Santa Lucia military airbase during the Aerospace Fair 2019 in Tecamac, Mexico, on April 27, 2019. (Xinhua/Xin Yuewei)

Aircrafts fly over the Santa Lucia military airbase during the Aerospace Fair 2019 in Tecamac, Mexico, on April 27, 2019. (Xinhua/Xin Yuewei)

A paratrooper jumps from a helicopter during the Aerospace Fair 2019 at the Santa Lucia military airbase in Tecamac, Mexico, on April 27, 2019. (Xinhua/Xin Yuewei)

Aircrafts fly over the Santa Lucia military airbase during the Aerospace Fair 2019 in Tecamac, Mexico, on April 27, 2019. (Xinhua/Xin Yuewei)

A paratrooper performs during the Aerospace Fair 2019 at the Santa Lucia military airbase in Tecamac, Mexico, on April 27, 2019. (Xinhua/Xin Yuewei)

People watch an air show during the Aerospace Fair 2019 at the Santa Lucia military airbase in Tecamac, Mexico, on April 27, 2019. (Xinhua/Xin Yuewei)

Mexican Air Force aircrafts are on display during the Aerospace Fair 2019 at the Santa Lucia military airbase in Tecamac, Mexico, on April 27, 2019. (Xinhua/Xin Yuewei)