20 years ago, on January 3, 1993, in Moscow, Boris Yeltsin and George Bush Sr. signed an agreement on a further reduction in strategic offensive weapons (START-2). The contract prohibited the use of ballistic missiles with separated head parts. After in June 2002 the United States left the software agreement from 1972, Russia in response left START-2. Instead of START-2, SNP acted (an agreement on a reduction in strategic offensive potentials), which was signed in Moscow on May 24, 2002.