(23.4.15) Beyond mines in Kazakhstan that are among the most lucrative in the world, the sale gave the Russians control of one-fifth of all uranium production capacity in the United States. Since uranium is considered a strategic asset, with implications for national security, the deal had to be approved by a committee composed of representatives from a number of United States government agencies. Among the agencies that eventually signed off was the State Department, then headed by Mr. Clinton’s wife, Hillary Rodham Clinton.