U.S. President Barack Obama is urging members of the United States Senate to ratify the new START nuclear arms reduction treaty with Russia before the end of the year.
Speaking in his weekly radio address, Obama said, "Without a new treaty, we'll risk turning back the progress we've made in our relationship with Russia."
The new treaty was signed by Obama and Russian President Dmitry Medvedev in Prague in April and would restrict each nation to a maximum of 1,550 deployed warheads.
The agreement also requires ratification by Russia's lower house, the Duma.
compiled from agency reports