Under a 1993 U.S.-Russian agreement, Russia will convert 500 metric tons of HEU from dismantled warheads to LEU by 2013. However, Russia will still be left with more than 550 metric tons of HEU. The United States, which possesses more than 740 metric tons of HEU, plans to convert or dispose of 174 metric tons that it has designated as "excess to its future military needs." But this process will not be completed until 2016 or later, after which the U.S. military will still retain some 570 metric tons of HEU.