The United States and Russia hope to have in place a new nuclear arms deal before the existing treaty expires in December. President Barack Obama and Russian President Dmitry Medvedev said they want a new deal in place before the 1991 Strategic Arms Reduction Treaty expires on Dec. 5. The White House announced Wednesday that the two countries would work together. White House spokesman Robert Gibbs said the two countries have not settled on a new cap. The current treaty limits the two largest nuclear arsenals to between 1,700 and 2,200 warheads. Obama and Medvedev met in London at a conference to deal with the global economy. It was the first time the two leaders have spoken in person.