1. A multi-spectral imaging system comprising: a first sensor sub-system configured to receive electromagnetic radiation in a first spectral band from a scene and to provide a first image signal; a second sensor sub-system configured to receive electromagnetic radiation in a second spectral band from the scene and to provide a second image signal; a processor coupled to the first and second sensor sub-systems and configured to produce a first image of the scene from the first image signal, and a second image of the scene from the second image signal, the second image having a variable lateral magnification; and a display coupled to the processor and configured to display the second image overlaid with the first image.