These nano sensors can be assembled into loops for mine detection (courtesy of Los Alamos National Labs, www.lanl.gov).	This is a pen-size battery-operated water purifier that uses a MEMS micropump and sensors, plus a filter, to treat drinking water quickly and inexpensively in the field for the military (courtesy of MIOX Corp., www.miox.com).
Shown is DARPA's future Space Surveillance Telescope, with optics on the left (courtesy of DARPA, www.darpa.mil).