An American photojournalist who contracted Ebola while working in Liberia is expected to arrive Monday in Nebraska, where he will be treated for the virus. Ashoka Mukpo, 33, will be the second patient to be treated at the Nebraska Medical Center’s specialized isolation unit. Mukpo was working in Liberia as a freelance cameraman for NBC News when he became ill last week. He is the fifth American to return to the United States for treatment since the start of the latest Ebola outbreak, which the World Health Organization estimates has killed more than 3,400 people. Meanwhile, Thomas Eric Duncan, the first person diagnosed with Ebola in the U.S., reportedly was fighting for his life in a Dallas hospital, breathing through a ventilator and receiving none of the experimental medicines for the virus.