guards). The purpose of such a community is to protect its residents from exterior violence. The same philosophy is seen on closed buildings and most shopping centres (many of them can only be accessed from inside the parking lot or the garage). In Pakistan, gated communities are located in big as well as small cities and are considered the standard of high quality living. Defence Housing Authority and Bahria Town are major private gated community developers and administrators and one of the largest in the world. The assets of Bahria Town itself are worth $30 billion. Most gated communities in Pakistan have public parks, schools, hospitals, shopping malls, gymnasiums, and country clubs. In Argentina, they are called "barrios privados" (literal translation "private neighbourhoods") or just "countries" and are often seen as a symbol of wealth. However, gated communities enjoy dubious social prestige (many members of the middle and upper middle class regard gated community dwellers as nouveaux riches or snobs). While most gated communities have only houses, some bigger ones, such as Nordelta, have their own hospital, school, shopping mall, and more. In post-apartheid South Africa, gated communities have mushroomed in response to high levels of violent crime. They are commonly referred to as "complexes" but also broadly classified as "security villages" (large-scale privately developed areas) or "enclosed neighbourhoods". Some of the newest neighbourhoods being developed are almost entirely composed of security villages, some with malls and few other essential services (such as hospitals). In part, property developers have adopted this response to counter squatting, which local residents fear due to associated crime, and which often results in a protracted eviction process. They are popular in southern China and Hong Kong, where most of the new apartment compounds have 24/7 guards on duty, and for some high-end residences, facial recognition systems to grant residents and domestic workers entry into the compound. The most famous of which is Clifford Estates in Guangzhou. In Saudi Arabia, gated communities have existed since the discovery of oil, mainly to accommodate families from Europe or North America. After threat levels increased from the late 1990s on against foreigners in general and U.S. citizens in particular, gates became armed, sometimes heavily, and all vehicles are inspected. Marksmen and Saudi Arabian National Guard armored vehicles appeared in certain times, markedly after recent terrorist attacks in areas near-by, targeting people from European or North American countries. Gated communities