How much U.S. money is the U.N. actually getting?

How much U.S. money is the U.N. actually getting?.. The U.S. is by far the biggest donor to the U.N., bankrolling 22% of the U.N.’s core budget, and roughly one-quarter of its far larger and murkier system-wide spending (estimated at somewhere upward of $25 billion). how to explain the missing $2.8 billion

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