The United Nations was stuffed to the gills with world leaders last week, but the real action was elsewhere. While presidents and prime ministers addressed the U.N. General Assembly, three crises escalated dramatically. In Syria, Russian warplanes launched their first strikes on rebel positions. In Afghanistan, the Taliban temporarily seized the northern city of Kunduz, the first major urban center to fall under their control since 2001. In the Central African Republic (CAR), U.N. peacekeepers fought with militias in the capital, Bangui, in an outbreak of violence that forced 40,000 civilians to flee. Each of these crises has the potential […]