The National Transportation Safety Board has been examining the battery from the Japanese Boeing 787 Dreamliner which was forced to make an emergency landing in Boston. Initial investigations show it was swollen from overheating. The battery will now be taken apart.
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"Africa is very important for the United States."
The incident happened at around 8pm local time on Thursday evening.
The Foreign Secretary said "good connections" were important, and suggested the Channel Tunnel might simply be "a first step."