Parachutists of the Singapore Armed Forces' Red Lions fall from the sky during National Day Parade rehearsal held in Singapore on Aug. 3, 2019. Singapore will celebrate its independence on Aug. 9. (Xinhua/Then Chih Wey)

Parachutists of the Singapore Armed Forces' Red Lions fall from the sky during National Day Parade rehearsal held in Singapore on Aug. 3, 2019. Singapore will celebrate its independence on Aug. 9. (Xinhua/Then Chih Wey)

A parachutist of the Singapore Armed Forces' Red Lions falls from the sky during National Day Parade rehearsal held in Singapore on Aug. 3, 2019. Singapore will celebrate its independence on Aug. 9. (Xinhua/Then Chih Wey)

Fireworks light up the sky during National Day Parade rehearsal held in Singapore on Aug. 3, 2019. Singapore will celebrate its independence on Aug. 9. (Xinhua/Then Chih Wey)

A parachutist of the Singapore Armed Forces' Red Lions falls from the sky during National Day Parade rehearsal held in Singapore on Aug. 3, 2019. Singapore will celebrate its independence on Aug. 9. (Xinhua/Then Chih Wey)

Fireworks light up the sky during National Day Parade rehearsal held in Singapore on Aug. 3, 2019. Singapore will celebrate its independence on Aug. 9. (Xinhua/Then Chih Wey)

Fireworks light up the sky during National Day Parade rehearsal held in Singapore on Aug. 3, 2019. Singapore will celebrate its independence on Aug. 9. (Xinhua/Then Chih Wey)

Fireworks light up the sky during National Day Parade rehearsal held in Singapore on Aug. 3, 2019. Singapore will celebrate its independence on Aug. 9. (Xinhua/Then Chih Wey)