The optics and photonics conferences in SPIE Security+Defence cross the divide between fundamental optical science and the application of the underpinning technologies in advanced defence and security systems. This is a unique symposium that will offer many opportunities to network with colleagues from a variety of disciplines in academia, industry, and government from all over the World, while addressing the new challenges that continue to emerge: network-enabled capability/network-centric warfare evolve; asymmetric warfare: military operations in the urban theatre; and peace-keeping.SPIE Security and Defence will consider how the fundamental and emerging technology base is likely to be exploited in the future will be changing: + Unmanned/Unattended Sensors and Sensor Networks + Electro-Optical and Infrared Systems: Technology and Applications + Electro-Optical Remote Sensing + Technologies for Optical Countermeasures + Military Applications in Hyperspectral Imaging and High Spatial Resolution Sensing + Advanced Free-Space Optical Communication Techniques and Applications + Photonic Components and Architectures in Defence Systems + Millimetre Wave and Terahertz Sensors and Technology + Optical Materials in Defence Systems Technology + Optics and Photonics for Counterterrorism and Crime Fighting + Optically Based Biological and Chemical Detection for Defence + Quantum Information SecurityWith a European focus, this event attracts more than 400 attendees in the security and defense sector, and is collocated with the SPIE Europe Remote Sensing meeting, allowing you to also take advantage of the cross section of 600 attendees working in a technical area rich in solutions for the security and defence community. Explore new opportunities to collaborate with colleagues and potential new partners in industry, academia, and government from around the world.Co-located Symposium – SPIE Remote SensingTwo great meetings in one great location! Your registration fee gains you access to all the conferences in both Security+Defence 2011 and Remote Sensing 2011.