File-This March 24, 2011, file photo shows United Nations Secretary General Ban Ki-Moon speaking after a Security Council meeting at United Nations headquarters in New York. The U.N. chief is taking aim at sexual abuse by peacekeepers, calling it "one of my greatest disappointments" and saying he will repatriate the troops of countries that don't act on allegations. The U.N. has already started to suspend payments to countries when allegations are credible. Ban Ki-moon's statements are in response to the first comprehensive assessment of peacekeeping in 15 years and largely agree with a high-level panel's suggestions for a major overhaul. (AP Photo/Stephen Chernin, File)