Ben Okita (L), Head of Research Operations of Save the Elephants organization, and Frank, Chief Operation Officer of Save the Elephants organization, check the signal device before taking off at the Tsavo West National Park, near Voi, Kenya, Feb. 23, 2017. The Kenya Wildlife Service (KWS) conducted an aerial census which ended last weekend on elephants and other large mammals at the 48,656 square-kilometer Tsavo-Mkomkazi ecosystem straddling the Kenya-Tanzania border to strengthen their protection amid multiple threats. (Xinhua/Sun Ruibo)
