FILE - In this Feb. 22, 2017, file photo, a fire set by protesters burns in the background as opponents of the Dakota Access pipeline leave their main protest camp Wednesday near Cannon Ball, N.D. A federal judge will hear arguments Tuesday, Feb. 28, 2017, about whether to stop the final bit of construction on the disputed Dakota Access pipeline, perhaps just days before it could start moving oil.(Tom Stromme/The Bismarck Tribune via AP, File)