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US safety board probes Boeing 787 battery approval

The National Transportation Safety Board holds an investigative hearing into the Boeing 787 battery fire April 23, 2013 in Washington, DC. The US safety officials investigating a battery fire on a Boeing 787 opened a two-day public hearing Tuesday to examUS safety officials investigating a battery fire on a Boeing 787 opened a two-day public hearing Tuesday to examine how the pioneering lithium-ion battery system was designed and approved for use.