CLAUDIA ROSETT: “What does it take to get promoted by Kofi Annan at the United Nations? For longtime U.N. staffer Abdoulie Janneh, it took less than two weeks after his recent testimony to investigators helped clear Annan of any role in his own son’s alleged misuse of the name and privileges of the secretary-general to ship a Mercedes duty-free into Ghana — at a savings of more than $14,000.”