Two little girls ride their scooters through the shimmering heat on the tarmac of a former military airport in Frankfurt, Germany, on a hot Monday, July 30, 2018. (AP Photo/Michael Probst)
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Two little girls ride their scooters through the shimmering heat on the tarmac of a former military airport in Frankfurt, Germany, on a hot Monday, July 30, 2018. (AP Photo/Michael Probst)
