Hugo Xavier became one of the first people to cross the world's longest pedestrian suspension bridge when it opened on Thursday near his tiny hometown of Arouca in northern Portugal. "Oh…here we go!," the 42-year-old said anxiously as he gathered enough courage to step onto the see-through metal grid pathway of the 516-metre-long (1693-ft) bridge alongside his equally jittery partner and a tour guide. Hidden between rock-strewn mountains covered …