Since 1945, the United States has manufactured and deployed more than 70,000 nuclear weapons to deter and if necessary fight a nuclear war. Some observers believe the absence of a third world war confirms that these weapons were a prudent and cost-effective response to the uncertainty and fear surrounding the Soviet Union's military and political ambitions during the cold war. As early as 1950, nuclear weapons were considered relatively inexpensive— providing "a bigger bang for a buck"—and were thoroughly integrated into U.S. forces on that basis. Yet this assumption was never validated. Indeed, for more than fifty years scant attention has been paid to the enormous costs of this effort—more than $5 trillion thus far—and its short and long-term consequences for the nation.