UPTON - A massive construction project at Brookhaven National Laboratory is more than halfway complete, and today, News 12 Long Island got a rare sneak peek at the state-of-the-art facility. As part of the $1 billion project, scientists are building the National Synchrotron Light Source 2, a device they describe as a giant electron microscope. Experts say the light source could facilitate many scientific breakthroughs, from advances in medicine to possibly reducing our dependence on foreign oil. "Potentially, oil companies can come here, or companies that make rechargeable batteries that could go into next generation of electronic cars," says Steve Swach, of the Brookhaven National Lab.Once the lab is open, the public could come and watch the scientists working on the experimental floor.The project is expected to be completed by 2015. This week, scientists began installing the equipment they will use that could lead to new discoveries.Brookhaven National Laboratory