Peter Greenberg joins Mexican President Felipe Calderón, one of the world's most dynamic heads of state, to showcase Mexico in a way no visitor has ever seen the country before.Peter Greenberg joins Mexican President Felipe Calderón, one of the world's most dynamic heads of state, to showcase Mexico in a way no visitor has ever seen the country before.Peter Greenberg joins Mexican President Felipe Calderón, one of the world's most dynamic heads of state, to showcase Mexico in a way no visitor has ever seen the country before.