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Italian Premier Silvio Berlusconi (L) and French President Nicolas Sarkozy at Villa Madama in Rome, Italy, 26 April 2011. Italian Prime Minister Silvio Berlusconi and French President Nicolas Sarkozy met in Rome on Tuesday to discuss the latest exodus of North African migrants, which has raised questions about the issue of open borders in Europe. Italian and French officials were expected to make public after Tuesday's meeting a plan containing proposed revisions to the European Union's Schengen treaty, which governs travel between its 25 co-signatory nations. Since January's uprising in Tunisia, an estimated 23,000 - mostly young, unemployed male Tunisians - have crossed the Mediterranean and arrived on the Italian island of Lampedusa - geographically the closest European Union territory to Tunisia. Italy and France have since been embroiled in a spat over who should accommodate the migrants. (KEYSTONE/EPA/ALESSANDRO DI MEO)