Nexen, an oil and gas company based in Alberta, owned and operated all of the oil facilities in Yemen, but sold all of its oil facilities to the Chinese when threats from al-Qaeda became too severe. (Photo: Jana Chytilova)

Nexen, an oil and gas company based in Alberta, owned and operated all of the oil facilities in Yemen, but sold all of its oil facilities to the Chinese when threats from al-Qaeda became too severe. (Photo: Jana Chytilova)

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