Update(1030ET): The Pentagon has just confirmed two additional deaths in Thursday’s downing of a KC-135 refueling tanker aircraft over Western Iraq. This brings the total deaths to six in the incident, which marks the single deadliest aerial event for the US side in the war. US: ALL CREW MEMBERS OF KC-135 LOSS IN IRAQ CONFIRMED DECEASED The Pentagon has further reiterated its stance it was not enemy or friendly fire. * * * The overnight confirmation that a US KC-135 went down over Western Iraq marks the single deadliest aerial incident suffered by the United States since the start of Operation Epic Fury. A Friday morning Pentagon briefing has confirmed that four of the six crew members on board have died, as rescue efforts for the two other service members continue. “The circumstances of the incident are under investigation,” it said in a statement on Friday. The Pentagon and US CENTCOM have sought to emphasize the KC-135 aircraft was not downed “due to hostile fire or friendly fire,” adding that it had crashed at about 2pm Eastern …