CHARLOTTE, North Carolina, Safar 11, 1436, Dec 3, 2014, SPA -- Dr. John Fankhauser was quarantined for three weeks after returning to the United States from West Africa where an Ebola outbreak has killed thousands of people. But as soon as his isolation was over, he began making plans to return for the third time, AP reported. Dr. Dan Crawford has spent a good part of his career doing medical missionary work. By the end of this week, the 64-year-old doctor and Fankhauser will head to the Liberian capital of Monrovia to help Ebola-stricken patients and others seeking medical help. The doctors are volunteers with SIM USA, a Christian mission group that operates a 200-bed hospital in Monrovia, as well as a 50-bed isolation unit for Ebola patients. Both said Tuesday they are going because there is still a need for doctors and health care workers. -- SPA 19:51 LOCAL TIME 16:51 GMT www.spa.gov.sa/w