A desert sign reading "Dubai, UAE" marks an undeveloped Expo 2020 project site in in this aerial view in Dubai, United Arab Emirates, on Tuesday, Nov. 11, 2014. Declining currencies in European countries whose citizens are among the leading buyers of Dubai homes are combining with falling oil prices and a tax on foreign property held by Indians to push down home prices in the emirate. Photographer: Chris Ratcliffe/Bloomberg via Getty Images
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