Prague – President Obama and President Dmitri A. Medvedev of Russia signed a nuclear arms control treaty on Thursday and opened what they hoped would be a new era in the tumultuous relationship between two former cold war adversaries.

The two leaders put aside the acrimony that has characterized Russian-American ties in recent years as they agreed to bring down their arsenals and restore an inspection regime that expired in December. Along the way, they sidestepped unresolved disputes over missile defense and other issues.

“When the United States and Russia are not able to work together on big issues, it is not good for either of our nations, nor is it good for the world,” Mr. Obama said as his words echoed through a majestic, gilded hall in the famed Prague Castle. “Together, we have stopped the drift, and proven the benefits of cooperation. Today is an important milestone for nuclear security and nonproliferation, and for U.S.-Russia relations.”

Mr. Medvedev called the treaty signing “a truly historic event” that will “open a new page” in Russian-American relations. “What matters most is this is a win-win situation,” he said. “No one stands to lose from this agreement. I believe this is a typical feature of our cooperation. Both parties have won.”

The Russian president signaled general support for the American-led drive to impose new sanctions on Iran, saying that Tehran’s nuclear program has flouted the international community. “We cannot turn a blind eye to this,” Mr. Medvedev said, while adding that sanctions “should be smart” and avoid hardship for the Iranian people.

(Read More at NYT)