What special powers did the five permanent members of the security council posses

The Security Council is composed of fifteen UN member States, five of which are permanent members -- United States, the United Kingdom, France, the Russian Federation, and China. The permanent members have the power to 'veto' a substantive decision of the Council by voting against it.

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veto a substantive decision of the Council

porter is writing economic history because he is focusing on the cost of developing vaccines.