The freedom of movement the Schengen area allows increases the difficulties of controlling immigration  The borderless nature of the Schengen Area makes it increasingly difficult to track and detain illegal immigrants. It is often easier for illegal immigrants to enter through countries such as Italy or Greece (and, as is feared when Bulgaria and Romania eventually join, Eastern European countries) and then continue on to countries like France and Germany [1] . For example, Italian Prime Minister Berlusconi's decision to grant temporary residence permits to more than 20,000 Tunisian migrants fleeing the violent uprisings in April, was made in the knowledge that many of the migrants would end up travelling to France, the former colonial ruler where many of the migrants have relatives [2] . France accused Italy of abusing the Schengen Agreement.  [1] Lipics, Laszlo, ‘Focal points on the external borders of Schengen’, AARMS, Vol. 9, No. 2, 2010 pp.229-239,  has a map of focal points of pressure of illegal immigration, all of which are in Eastern Europe  [2] ‘France and Italy call for tighter border controls’, theparliament.com, 27th April 2011