Just after agreeing to an ultimatum given with the cartel, Gus can take Mike and Jesse down with him to Mexico, the place they may have Jesse train the cartel experts (led by Benicio Fuentes) ways to cook the blue meth. Gus returns from Mexico and his connection with Walt https://bluecrystalmath08405.blogrelation.com/35624021/blue-crystal-math-fundamentals-explained