Photos: A look back at the 2010 Gulf oil spill
gulf well relief oil drilling bp
Credit: AP Images
The relief wells, which are being drilled by the Transocean Development Driller II, left, and Development Driller III, foreground right, are seen at the Deepwater Horizon oil spill site over the Gulf of Mexico, off the Louisiana coast, Tuesday, July 20, 2010. (AP Photo/Gerald Herbert)
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