BBC NEWS | Americas | Barack Obama's full Prague speechPage last updated at 12:26 GMT, Sunday, 5 April 2009 13:26 UK Barack Obama has outlined his vision of a world free of nuclear weapons in a major speech in Prague, capital of the Czech Republic. The US president called for a global summit on nuclear security and the forging of new partnerships to prevent the spread of nuclear weapons. He said he hoped to negotiate a new treaty to end the production
