U.N. head begins Myanmar visit NAYPYITAW, Myanmar, April 29 (UPI) -- U.N. Secretary-General Ban Ki-Moon arrived in Myanmar Sunday to discuss furthering political reforms in the Asian nation, the United Nations said. The three-day visit is Ban's third official trip to Myanmar and was made at the invitation of President U Thein Sein. Myanmar this month held its first by-election since the transition to a civilian government last year. The United Nations and other international organizations sent observers to monitor the voting, China's Xinhua news agency said. "Myanmar is only at the beginning of its transition and many challenges lie ahead," Ban said prior to his departure. Many concerns have yet to be addressed yet I am convinced that we have an unprecedented opportunity to help the country advance towards a better future. The United Nations said Ban's agenda included meetings with the president and parliamentary leaders as well as high-profile political dissident Aung San Suu Kyi, who was herself elected to Parliament in this month's vote.