Mr. Annan came to office after a stint as head of U.N. peacekeeping operations. The period corresponded with the massacre in Srebenica of 7,000 Bosnians and the genocide of 800,000 Tutsis in Rwanda, both of which were facilitated by the nonfeasance of peacekeepers on the ground. It was later revealed that Mr. Annan’s office explicitly forbade peacekeepers from raiding Hutu arms caches in Rwanda just four months before the genocide.

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