Sandia's primary mission is ensuring the U.S. nuclear arsenal is safe, secure, reliable, and can fully support the Nation's deterrence policy. Employing only the most advanced and failsafe technologies to fulfill our responsibilities as stewards of the nuclear stockpile, Sandia is responsible for the development, design and maintenance of approximately 90 percent of the several thousand parts found in any given weapon system, including radiation-hardened microelectronics. In support of this mission, Sandia National Laboratories has a significant role in advancing the "state-of-the-art" in microsystems research and development and in introducing microsystems into the nuclear stockpile. Microsystems incorporate radiation-hardened microelectronics as well as other advanced components such as micromachines, optoelectronics, and photonic systems. The MESA Complex is designed to integrate the numerous scientific disciplines necessary to produce functional, robust, integrated microsystems and represents the center of Sandia's investment in microsystems research, development, and prototyping activities. This suite of facilities encompasses approximately 400,000 square feet and includes cleanroom facilities, laboratories and offices.