Congo president says whoever killed U.N. experts will be punished

By Michelle NicholsUNITED NATIONS (Reuters) - Congolese President Joseph Kabila told the annual gathering of world leaders at the United Nations on Saturday that he would ensure those responsible for killing two U.N. investigators earlier this year would be punished.Michael Sharp, an American who was coordinator of an independent sanctions monitoring group, and Zaida Catalan, a Swede, were killed in central Congo on March 12 while carrying out investigations for a report to the U.N. Security Cou