Brazil takes aim at U.S. farm subsidies as Rousseff readies visit

By Alonso Soto BRASILIA (Reuters) - After finally turning the page on a dispute over spying that hampered attempts to deepen trade ties, Brazil and the United States may be headed for another clash, this time over U.S. farm subsidies. Brasilia is gathering evidence to show that the United States is increasing subsidies for soy and corn farmers, which threatens to further push down prices for the key crops grown in the South American country and hurt its already sputtering economy, four Brazilian