Mexico’s government said it was bolstering security at tourist sites after a man opened fire on tourists at pyramids outside Mexico City less than two months before the Fifa World Cup. The Monday shooting, carried out by a lone gunman on top of one of the Teotihuacan pyramids – a Unesco World Heritage Site and one of Mexico’s most frequented tourist attractions – killed one Canadian tourist and injured a dozen more. It also set off a flurry of questions the next morning by reporters to Mexican...