Explain the rich culture of the Mexico-US border and yet there are long term attempts at "cultural regulation" primarily implemented by border guards on the USA side of the border.

US-Mexico border culture and fences
The border between Mexico and US is one of the largest borders in the world. On each side of the border thrives different cultures and with the interaction of the two cultures is born another unique culture that incorporates both similarities and differences of the two countries. This culture is highly influenced by the economic interdependence between the two countries.
Both America and Mexico are countries highly unequal when it comes to their economies. However, this inequality forms one of the central roots in the development of a rich culture of interaction and interdependence between the two countries. While the national culture of both the countries is vastly different, the interaction between the two countries has lead to the development of a highly rich and unique border culture like the development and prevalence of a unique spoken language “Spanglish” in the borderlands combining English...