U.S. President Barack Obama and Russian President Dmitry Medvedev concluded a series of agreements Monday -- including one on nuclear arms reduction. The summit in Moscow was needed to help "reset" a relationship that, according to Obama, "has suffered from a sense of drift" in recent years. "Too often, the United States and Russia only communicate on a narrow range of issues or let old habits within our bureaucracy stand in the way of our progress," Obama was quoted as saying by CNN. "President Medvedev and I are committed to leaving behind the suspicion and the rivalry of the past, so that we can advance the interests that we hold in common."