Since the first experiment achieving quantum ghost imaging of an opaque object, performed by the authors
at the Army Research Laboratory, ghost imaging research has increased. That physics experiment resulting in
the image of toy soldier created a new imaging paradigm. Prior to that all images of opaque objects were made
by receiving patterns of the object from reflection and scattering of the light into a camera. In the ghost imaging
experiment light patterns only came from the light source and the image was made from coincidences of those
and photon counts of reflected and scattered photons received from the object. Since that original ghost imaging
experiment, approximately thirteen years after ghost imaging of transmissive objects was introduced, ghost
imaging is providing a new and proweful quantum tool for future improved imaging missions in the environment.