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FILE PHOTO: A blast is pictured at a quarry of
FILE PHOTO: A blast is pictured at a quarry of the cement plant of Holcim near the eastern Swiss village of Untervaz November 26, 2014. REUTERS/Arnd Wiegmann
FILE PHOTO: A blast is pictured at a quarry of the cement plant of Holcim near the eastern Swiss village of Untervaz November 26, 2014. REUTERS/Arnd Wiegmann