CONSTRUCTION: Workers use... Pictures

CONSTRUCTION: Workers use heavy machinery to install sections of the Keystone Pipeline south of Cushing, OK, Tuesday, January 15, 2013,  By Paul Hellstern, The Oklahoman
CONSTRUCTION: Workers use heavy machinery to install sections of the Keystone Pipeline south of Cushing, OK, Tuesday, January 15, 2013, By Paul Hellstern, The Oklahoman

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