SAO PAULO — The last time the U.S. played in a World Cup in Brazil, just one American reporter was on hand, using vacation time and paying his own way. Sixty-four years later, about 100 credentialed U.S. media members are covering the tournament — and that doesn't even include staffers from the networks broadcasting the games. Back home, millions of people are watching on giant screens or office computers, at bars and public gatherings.