Hold the left mouse button down as you drag the slider above the image (or use the arrow buttons) to fade between the GOES-8 3.9 micrometer shortwave IR image and the corresponding GOES-8 visible image at 22:32 UTC on 12 May 2000. Note the wildfire "hot spots" (black pixels) on the IR image near Los Alamos (station identifier KLAM), with the associated smoke plumes streaming east-southeastward on the visible image. The red K at Los Alamos indicates that surface visibility was restricted due to smoke.