 The new ten-year pact, which is called the " New START Treaty ", requires the U.S. and Russia to cut their inventory of nuclear warheads to about 1,500 each in the next seven years.
<clarity>  The new ten-year pact, which is called the " New START Treaty ", requires the U.S. and Russia to cut their inventory of nuclear warheads to about 1,500 each in the next seven years.
 The new ten-year pact, which is called the " ", requires the U.S. and Russia to cut their inventory of nuclear warheads to about 1,500 each in the next seven years.