Furlong, vice president of site operations at Facebook, and Kjellgren, data centre manager, attend a news conference in Lulea

Tom Furlong (L), vice president of site operations at Facebook, and Joel Kjellgren, data centre manager, attend a news conference in Lulea June 12, 2013. Facebook opened its first 300,000 sq foot (28,000 sq metre) server hall outside the U.S. in northern Sweden on Wednesday, according to news reports. REUTERS/Susanne Lindholm/Scanpix Sweden (SWEDEN – Tags: SCIENCE TECHNOLOGY BUSINESS)

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