Fireworks explode above Singapore's financial skyline at dusk as part of celebrations for the nation's 50th year of independence, Sunday, August 9, 2015, in Singapore. Singapore declared independence on August 9, 1965. (Photo by Wong Maye-E/AP Photo)

The Republic of Singapore Air Force performs a “50” formation during an aerial display in Singapore's Golden Jubilee celebrations near the central business district August 9, 2015. (Photo by Edgar Su/Reuters)

People watch fireworks during Singapore's Golden Jubilee celebrations at the Padang near the central business district August 9, 2015. Singapore marks 50 years of independence on Sunday. An island of 5.5 million people that sits just north of the equator, what was a post-colonial backwater at independence from Malaysia in 1965 is now a global business hub whose economic and social model is the envy of nations around the world. (Photo by Edgar Su/Reuters)

Entertainers perform on stage during the National Day Parade at Padang on August 9, 2015 in Singapore. Singapore is celebrating her 50th year of independence on August 9, 2015. (Photo by Suhaimi Abdullah/Getty Images)

A woman cries as she watches a video tribute to the late former prime minister Lee Kuan Yew during Singapore's Golden Jubilee parade at Padang near the central business district August 9, 2015. (Photo by Edgar Su/Reuters)

Fireworks explode over Marina Bay during Singapore's Golden Jubilee celebrations, in Singapore August 9, 2015. Singapore marks 50 years of independence on Sunday. An island of 5.5 million people that sits just north of the equator, what was a post-colonial backwater at independence from Malaysia in 1965 is now a global business hub whose economic and social model is the envy of nations around the world. (Photo by Tan Shung Sin/Reuters)

Singapore's President Tony Tan (C) watches as tanks roll past during Singapore's Golden Jubilee parade at Padang near the central business district August 9, 2015. (Photo by Edgar Su/Reuters)

A Singapore Airforce F-15SG fighter aircraft executes a combat turn as part of celebrations for Singapore's 50th year of independence, Sunday, August 9, 2015, in Singapore. (Photo by Wong Maye-E/AP Photo)

People hold up Singapore banners during Singapore's Golden Jubilee celebration parade at Padang near the central business district August 9, 2015. (Photo by Edgar Su/Reuters)

Children wearing LED-lit costumes perform during Singapore's Golden Jubilee celebration parade at Padang near the central business district August 9, 2015. (Photo by Kevin Lam/Reuters)

Fireworks explode during Singapore's Golden Jubilee celebrations near the central business district August 9, 2015. (Photo by David Loh/Reuters)

Performers wearing illuminated LED suits on the parade square, called the “Padang”, during the National Day Parade in Singapore, August 9, 2015. The parade features a military column, an aerial flypast titled “Salute to the Nation”, dance performances and ends with a firework display over the Marina Bay. Singapore is celebrating its golden jubilee with a yearlong national campaign titled “SG50” to commemorate its 50th anniversary of independence when the island nation separated from the Federation of Malaysia on 09 August 1965. (Photo by Wallace Woon/EPA)

People wave the “Singapore” scarf during the National Day Parade at Padang on August 9, 2015 in Singapore. Singapore is celebrating her 50th year of independence on August 9, 2015. (Photo by Suhaimi Abdullah/Getty Images)

The mobile column display roll past in front of City Hall during the National Day Parade at Padang on August 9, 2015 in Singapore. Singapore is celebrating her 50th year of independence on August 9, 2015. (Photo by Suhaimi Abdullah/Getty Images)

Entertainers perform on stage during the National Day Parade at Padang on August 9, 2015 in Singapore. Singapore is celebrating her 50th year of independence on August 9, 2015. (Photo by Suhaimi Abdullah/Getty Images)