Rep. Darrell Issa (R-Calif.), top Republican on the House Committee on Oversight and Government Reform released documents Thursday night showing the Coast Guard recorded on April 21 -- less than 24 hours after the Deepwater Horizon explosion -- the magnitude of the oil leak disaster in the Gulf of Mexico. “Potential environmental threat is 700,000 gallons of diesel on board the Deepwater Horizon and estimated potential of 8,000 barrels per day of crude oil, if the well were to completely blowout,” the Coast Guard reported in a log of events from the immediate aftermath of the April 20 explosion --...