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Yaroslav Segeda takes a selfie of himself and friends on top of a crane in Kiev Extreme urban climbers take ‘selfies’ on top of tall buildings, Kiev, Ukraine, April 2015 (Credit: Rex Features via AP Images)

Yaroslav Segeda takes a selfie of himself and friends on top of a crane in Kiev Extreme urban climbers take 'selfies' on top of tall buildings, Kiev, Ukraine, April 2015 (Credit: Rex Features via AP Images)