Photos: City skylines across the globe
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Credit: AFP/Getty Images
The Singaporean national flag is flown from a Republic of Singapore Air Force CH-47SD Chinook heavy transport helicopter (C) while a pair of AH-64D Longbow Apache attack helicopters provide escort as they fly across the financial district skyline as seen from the Singapore Flyer during festivities for the city state's national day celebrations on August 9, 2011. (SIMIN WANG/AFP/Getty Images)
