Brian Williams is stepping away from NBC Nightly News for several days. The anchor sent a note to the show's staff, announcing that Lester Holt is replacing him this week. The news comes as the anchor is embroiled in a scandal surrounding his story about being a passenger in a helicopter that took fire in the Iraq War. Williams' message can be seen, below. "In the midst of a career spent covering and consuming news, it has become painfully apparent to me that I am presently too much a part of the news, due to my actions. "As Managing Editor...