A surgeon who contracted the Ebola virus while working in Sierra Leone died at a Nebraska hospital where he was transported for treatment, the facility said Monday. A statement released Monday by Nebraska Medical Center said Dr. Martin Salia "has passed away as a result of the advanced symptoms of the disease." "Dr. Salia was extremely critical when he arrived here, and unfortunately, despite out best efforts, we weren't able to save him," said Dr. Phil Smith, medical director of the biocontainment unit. Salia, 44, was being treated in the medical center's biocontainment unit. He arrived Saturday by plane from West Africa, and was transported by ambulance for treatment at the hospital, where two other Ebola patients have been successfully treated