NBC News’ Brian Williams was not, as he has previously claimed, aboard a U.S. Air Force helicopter that was hit by two rockets and grounded during the 2003 Iraq invasion. In what was surely a moment of vindication for those who were actually aboard the grounded aircraft, the Nightly News anchor admitted Wednesday that the harrowing story he and NBC had been perpetuating since 2003 was false. “I would not have chosen to make this mistake,” Williams told the military publication Stars and Stripes, Wednesday. “I don’t know what screwed up in my mind that caused me to conflate one...