To our readers: A review by NBC News has found 11 articles written by a reporter over the last year that did not meet our standards for original material. The articles contained passages from other news organizations that were used without attribution. In all cases, the passages were not central to the stories, but instead contained supplemental or background material that did not represent original reporting. An editor’s note has been placed on each of the articles, and the passages that were plagiarized have been removed. Maintaining the trust of our readers and viewers is essential to NBC News, and...