In 2001, as part of a program established by the United States Government and the United Nations High Commissioner for Refugees (UNHCR), approximately 3,800 Lost Boys were offered resettlement in the United States.[11] Prior to the inception of this program, approximately 10,000 boys left the refugee camps for other opportunities, making them ineligible for the US's resettlement program.[15] They are now scattered over at least 38 cities, including major metropolises such as Chicago, Dallas, Boston, Seattle and Atlanta.[3] Halted after 9/11 for security reasons, the program restarted in 2004. As of 2006, the largest population of Sudanese refugees in the United States is in Omaha, Nebraska, which hosts about 7,000 people.[16] Numerous resettlement agencies, such as Catholic Charities, Lutheran Social Services, the IRC (International Rescue Committee), World Relief and other privatized organizations assisted in this resettlement process. A variety of programs have been initiated to help these displaced people in areas of education, medical assistance, reconnecting with families in South Sudan and in rebuilding efforts and providing humanitarian aid in Southern Sudan.[11]