NEW YORK – Days after Sri Lanka’s government defeated its long-time foe, the Tamil Tigers, in May, United Nations Secretary-General Ban Ki-moon flew into the country’s capital, Colombo, for a 24-hour visit to urge its president to open up its refugee camps to international aid groups. This was another urgent trip by Ban to a war-torn capital, as part of his regular duties as the UN’s chief representative, seeking to uphold peace and restore global comity.