Michel Sidibé, Executive Director of UNAIDS and Under-Secretary-General of the United Nations visited the office of Sustainable Energy for All where he was warmly received by his colleague Kandeh K. Yumkella, Chief Executive Officer and Under-Secretary-General. During his courtesy call, both men discussed matters of importance including the importance of energy which is essential for the work of both organizations that they lead. Mr. Yumkella noted that Mr. Sidibé becomes the first UN chief executive to have visited his office as he led him on a conducted tour of the entire office while introducing him to the initiative's staff.