USA vs France: Complete Preview for London 2012 Showdown:    Now that the 2012 Team USA basketball team has emerged from the exhibition games unscathed, it faces what may be one of its biggest challenges in London this year when LeBron James and the USA clash with Tony Parker and the France national team.    France touts what may be the closest thing to an NBA roster, and it has an advantage in that the entire team is familiar with one another. Despite only winning one Olympic medal in...