The U.S. doctor who contracted Ebola while working on a humanitarian mission in Congo has been released from a hospital in Germany after recovering from the potentially deadly disease. Dr. Peter Stafford was working with the missionary group Serge in the Congo when he was infected with the virus, the group said. He was evacuated to a hospital in Berlin to receive care on May 20, according to the group. His wife, also a doctor volunteering with Serge, and their four children were also evacuated