(Reuters) – U.S. anchor and journalist Brian Williams will leave NBC News and MSNBC next month after nearly three decades with the company to spend time with his family, MSNBC President Rashida Jones said in a memo on Tuesday. Jones said Williams’ time at NBC has been marked by breaking countless major stories and attracting leading journalists and guests to his programs. “Brian Williams has informed us he would like to take the coming months to spend time with his family. He will be signing off from The 11th Hour at the end of the year,” Jones said in a memo seen by Reuters. Williams said in …