Insiders reveal the secrets of Mauricio Pochettino's American revolution: Bruce Springsteen, fast food joint Chick-fil-A, the manager's own 'Dick Cheney', the message he sent to star boy Christian Pulisic and the new 'family' vibe around camp

Late last Friday night, Mauricio Pochettino gathered his staff in an office at the USA's team hotel near Laguna Beach - around 50 miles south of Los Angeles and fired up the speakers.