Case study Exposing a massacre and demolitions in Nigeria with satellite images Example 1: Demolition of Mosque Before Following reports about killings and demolitions in Zaria, Nigeria in December 2015, analysts from Amnesty International reviewed free online satellite images from Google Earth to find supporting evidence for large-scale unlawful killings by the Nigerian military, exposing a After crude attempt by the authorities to conceal evidence. Thankfully, in this instance, Google Earth contained up-to-date imagery that could be accessed with the “Historical Imagery” slider in the top left menu. This feature allows you to see how landscapes change over time. In the case of Zaria, it helped identify several demolished areas, including a cemetery and mosque, as well as the appearance of a likely mass grave. The “Save Map” function was used to download images for Example 2: Mass Grave Before reporting. All Google Earth images can be used freely for non-commercial purposes. Paying for the pro version enables downloads of highresolution images that are better for print. To aid the visual impact of satellite imagery in online reports, a simple slider can be created allowing a reader to explore temporal changes for themselves. One free and easy tool to create an embeddable slider is Juxtapose. After Example 1: Demolition of Mosque Before: https://c2.staticflickr.com/8/7754/26656228073_56a3c2f374_c.jpg After: https://c2.staticflickr.com/8/7236/27261977225_9774490f7e_c.jpg Example 2: Mass Grave Before: https://c2.staticflickr.com/2/1507/25903760253_1713948455_c.jpg After: https://c2.staticflickr.com/2/1704/25901693544_717cff591d_c.jpg See before-after sliders of all locations on the Google Earth Blog. 57