The world has never been as dynamic as today with its population crossing borders of countries and regions in every corner of the earth. According to the Migration and Remittances Factbook 2011 (World Bank, 2011a), more than 215 million people (3.2% of the world population) lived outside their countries of birth in 2010. While the United States is the top receiving country with 20% of the world’s immigrants, Mexico is the top sending country with 11.9 million of outflow in 2010. In Qatar, 86.5% of the population was composed of immigrants from other countries; whereas in West Bank and Gaza, 68% of the country’s population had emigrated