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An aerial view shows the site along the French-Swiss border near Geneva where the Large Hadron Collider, the world's most powerful atom smasher, is going to be built. The super collider will be constructed in the 17-mile circular tunnel now in existence. On Friday, a European coalition of 19 nations approved the $2 billion project and said it hopes the United States, Japan and other nations chip in money. Many American scientists are hoping to conduct experiments using the European-built super collider.