At 4:27 a.m., Eastern time, protons made their first circuit around a 17-mile circular track known as the Large Hadron Collider, located 300 feet underneath the Swiss French border. After 14 years and $8 billion, scientists at the European Center for Nuclear Research, or CERN, outside Geneva, succeeded in starting up the most powerful machine ever built for examining elemental particles and forces of nature. Dr. Julian Bunn from Caltech joins Larry to talk about the LHC and some of the controversy surrounding its construction and use.
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