Anchorman Brian Williams, a 28-year veteran of NBC News and MSNBC, said Tuesday that he is leaving the company at the end of this year. “This is the end of a chapter and the beginning of another,” Williams said in a statement. “There are many things I want to do, and I’ll pop up again somewhere.” For the past 5 years, Williams has anchored “The 11th Hour,” an end-of-the-day newscast and political talk program. CNN Business reported in August that his contract was expiring in the next six months and that he wanted to move off the late-night hour. His...