Brussels, 29/04/2002 (Agence Europe) - On the occasion of their annual summit in Washington on Thursday, the leaders of the Union and the United States will trigger a strengthening of transatlantic co-operation in a vast effort at convincing their respective publics and the rest of the world that this essential partnership - and leadership - is a reality, at a time when the mounting tensions between the two occupy media headlines and has led observers, as well as certain European leaders, to...