Each year the United States admits a limited number of refugees to escape persecution and resettle in the U.S. A refugee as defined under the Immigration and Nationality Act is an individual who is unable to return to his country of origin due to persecution of well founded fear of persecution because of his race, religion, nationality, political opinion or membership in a particular social group. While this definition is aligned with that of the UN Convention Relating to the Status of Refugees, not all persons under the wider mandate of protection of the United Nations High Commissioner for Refugees are eligible for resettlement in the United States. Generally, the eligibility determination for immigrants under the U.S. Refugee Program begins with a recommendation of the UNHCR or the U.S. Embassy for U.S. resettlement or the U.S. government denitrifies a particular group of people of particular interest. The recommendation goes to the United States Citizenship and Immigration Services (USCIS) who determines the eligibility for U.S. resettlement. Some of the factors that the USCIS uses to determine eligibility for resettlement are bases on the refugee's criminal background and health.