Barack Obama and Vladimir Putin had a surprise one-on-one meeting on the sidelines of the G-20 summit today, hashing out their disagreements on Syria without coming to any real conclusion. Obama described it as a "candid and constructive conversation" and Putin called it "substantial and constructive," according to the AP, even though neither changed their mind. "We stuck to our guns," Putin said. "We do not agree with those arguments, but still we can hear them. … Everybody understood one another." More developments from the conference: