HOT ZONE Surrounded by Ebola patients, a health worker, center, gives a thumbs-up to visitors near the hot zone, defined by the double barrier orange fence, in Liberia, Sept. 26, 2014. If a sick person falls, the patient cannot contaminate the clean zone. U.S. Africa Command is supporting the effort by providing command and control, logistics, training and engineering assets. U.S. Agency for International Development is the lead U.S. government organization. SHARE: Download: Full Size (0.09 MB) Credit: VIRIN: 804529-I-MPD86-865.jpg Photo Gallery