TOPSHOT - Impalas walk near the elevated railway that allows movement of animals below the tracks at the construction site of Standard Gauge Railway (SGR) in Nairobi National Park, Kenya, on November 21, 2018. - The SGR phase 2A project is an 120km extensiton of the Mombasa-Nairobi SGR project (Phase 1) to Naivasha with the longest railway bridge in the country, 5.8km Super Major Bridge, constructed across Nairobi National Park. (Photo by Yasuyoshi CHIBA / AFP)