Mirroring protests across Europe, thousands of farmers in Spain staged a second day of tractor demonstrations on Wednesday across the country, blocking highways to demand changes in European Union farming policies and measures to combat production cost hikes and severe drought. The protests led to several main national highways being blocked. State news agency Efe said that 1,000 tractors were heading slowly towards Barcelona's city center, causing major traffic jams on roads into the northeastern port capital of Spain's Catalonia region.