ESA Return to https://www.halos.com/faq-replies/knoxville-sentinel-4-12-1987-gif.htm. ESA Knoxville Sentinel Ad April 12, 1987 The above page was found at https://www.halos.com/faq-replies/knoxville-sentinel-4-12-1987-gif.htm on April 26, 2024. © 2004 Earth Science Associates