Vaclav Klaus
PRAGUE - President Barack Obama and Russian President Dmitry Medvedev (dih-MEE'-tree med-VYEH'-dyev) have signed a milestone treaty to cut both countries' warhead arsenals by nearly a third.
PRAGUE - Pushing his vision of a nuclear weapons-free world, President Barack Obama returned to Prague on Thursday to sign a pivotal treaty aimed at sharply paring U.S.
