Tiny metallic nanoparticles have the potential to change the landscape of defense technology, from obscuring warfighters from view to providing transparent displays in aircraft and vehicles. A nanoparticle is defined as a particle with one or more dimensions measuring 1 billionth of a meter (1 nanometer [nm]). Typical nanoparticles range from 1 to 1,000 nm. A typical human hair is about 90,000 nm thick. Therefore, an item of 1 nanometer would be invisible to the naked eye. Scientists at the U.S. Army Edgewood Chemical Biological Center (ECBC), the Massachusetts Institute of Technology's Institute for Soldier Nanotechnologies (MIT-ISN) and the Harvard University Department of Physics are using nanoparticles to develop a novel transparent display technology and improve the design of obscurants, which are used to generate smoke that can hide a warfighter from plain sight.