Hold the left mouse button down as you drag the slider above the image (or use the arrow buttons) to fade between the MODIS 10.7 micrometer IR and the corresponding IR fog/stratus product over the South Dakota/Minnesota region at 04:54 UTC on 05 March 2001. To zoom, click on the "Zoom" button, and then click the "hand" cursor on the image where you want to center the zoom.