People arrive to hear Tesla Motors Inc CEO Elon Musk (not pictured) demonstrate Tesla's new battery swapping program in Hawthorne, California, in this June 20, 2013 file photo. California lawmakers ... more 
People arrive to hear Tesla Motors Inc CEO Elon Musk (not pictured) demonstrate Tesla's new battery swapping program in Hawthorne, California, in this June 20, 2013 file photo. California lawmakers proposed financial incentives for electric car maker Tesla Motors Inc on June 5, 2014 in a bid to entice the company to build a large battery factory in the most populous U.S. State. REUTERS/Lucy Nicholson/Files (UNITED STATES - Tags: POLITICS TRANSPORT BUSINESS EMPLOYMENT ENERGY) less 
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Reuters | Photo By LUCY NICHOLSON / REUTERS
Fri, Jun 6, 2014 12:36 AM EDT