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As the importance and dependence of specific mineral commodities increase, so does concern about their supply. The United States is currently 100 percent reliant on foreign sources for 20 mineral commodities and imports the majority of its supply of more than 50 mineral commodities. Mineral commodities that have important uses and face potential supply disruption are critical to American economic and national security. However, a mineral commodity's importance and the nature of its supply chain can change with time; a mineral commodity that may not have been considered critical 25 years ago may be critical today, and one considered critical today may not be so in the future. The U.S. Geological Survey has produced this volume to describe a select group of mineral commodities currently critical to our economy and security. For each mineral commodity covered, the authors provide a comprehensive look at (1) the commodity's use; (2) the geology and global distribution of the mineral deposit types that account for the present and possible future supply of the commodity; (3) the current status of production, reserves, and resources in the United States and globally; and (4) environmental considerations related to the commodity's production from different types of mineral deposits. The volume describes U.S. critical mineral resources in a global context, for no country can be self-sufficient for all its mineral commodity needs, and the United States will always rely on global mineral commodity supply chains. This volume provides the scientific understanding of critical mineral resources required for informed decisionmaking by those responsible for ensuring that the United States has a secure and sustainable supply of mineral commodities.
That Africa--one of the superpowers' crucial diplomatic and economic battlegrounds--now verges on political developments as dramatic as those of eastern Europe compels us to consider the tremendous influence that East and West have wielded in recent African political development. Drawing from American diplomatic archives, firsthand interviews, and the African and international press, Zaki Laidï presents a historical analysis of how the dialectical relationships of the United States, Soviet Union, and African actors evolved to their present state. The lapse of European influence in the 1960s left a diplomatic void, which the superpowers rushed to fill. Just as Dien Bien Phû and the Suez crisis thrust Asia and the Near East, respectively, into the diplomatic spotlight, so the Angolan crisis lent a multifaceted cast to Africa's international relations. The ebb and flow of African crises is now linked to the rhythm of superpower relations, but Laidï is quick to warn that Africa's internal political circumstances shape the boundaries for external influence and constrain any efforts of the superpowers to exert total control. Laidï's provocative study, here in its first English translation, addresses diplomatic strategy, often neglected economic considerations, the growing influence of the Bretton Woods institutions, and the decline of French influence in Africa.