The Czech President Václav Klaus has met with the American Vice-President Joe Biden as part of a four-day visit to the United States. The US again confirmed its interest in cooperating with the Czech Republic on a new missile defence system replacing an earlier proposal by the previous US administration. Mr Klaus said that the “exceptionally friendly” meeting had picked up where discussions with Mr Biden had left off a few weeks earlier during the latter’s visit to Prague. On Wednesday Mr Klaus gave a speech on global warming and a day later met with members of Congress. From Washington he will be flying to California for a conference on Ronald Regan and the fall of communism, and will be returning to Prague on Sunday.