Saharan dust swept northward across Libya and northwestern Egypt toward the Mediterranean on February 23, 2007. The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite took this picture the same day. In this image, the semitransparent plume of dust covers most of Libya and part of Egypt. The dust also appears over Chad, with part of the plume covering a dark, rocky area near the lower left corner of the image. The dust storm did not likely originate in this region, but farther south.