(CNN) -- A doctor who spent time treating Ebola patients in West Africa died from the virus Monday in Nebraska. The death of Dr. Martin Salia, who contracted Ebola in Sierra Leone, marks the second time Ebola has claimed a victim in the United States. "It was an absolute honor to care for Dr. Salia," said Nebraska Medical Center Chief Nursing Officer Rosanna Morris at a news conference in Omaha. She sat alongside four other doctors who said they did everything possible to try to save the surgeon. Salia traveled between Sierra Leone where he contracted the virus, and his home in Maryland where his children and wife live. Morris said that caring for Salia has taught the Nebraska team a lot. Spending time with Salia's wife, Isatu Salia, shed light on how anguishing it is to have a loved one suffer from Ebola, Morris said.