The United Nations' vast system has tackled everything from delivering life-saving humanitarian aid to providing crucial peacekeeping operations in conflict zones since it was established in the wake of World War II.
As the international body closes in on 80 years, questions about its relevancy and efficiency have sharpened from supporters and critics alike. Recent U.S. cuts to foreign assistance and the reevaluation of humanitarian contributions by other countries have forced a reckoning for the U.N.
