Reporters and broadcasters who cover a World Cup often don’t get a chance to unpack their luggage. The assignment is one that typically sends them hurtling from one airport to another, exploring the vast expanse of a host nation, rarely dwelling in one place for long. Barney Ronay, the chief sports writer for The Guardian, took 17 flights over the course of 30 days while covering the 2014 World Cup in Brazil. John Strong, the lead…