Sandia National Laboratories and a Walt Disney Co. subsidiary, Buena Vista Pictures Distribution Inc., have joined forces to more efficiently light up the night sky for millions of tourists at Disney theme parks around the world. The bridge, a silicon circuit first developed by Sandia for defense applications--such as weapons detonation--will be used to ignite elaborate displays of fireworks and other explosive-based delights at the Disney parks. The joint venture is part of a $300,000 CRADA between the lab and company. The semiconductor will replace the less-precise and environmentally unfriendly black powder time-delay fuses currently used. Other Sandia-Disney projects in the offing include adapting such technologies as intelligent vehicles, "smart" materials (which respond to environmental stimuli), and noise and vibration control.