The Trump administration finalized the first US deep-sea mining auction off American Samoa, covering 31 million acres despite local and environmental opposition. Donald Trump has called deep-sea mining in the region a 'core' US interest. Key points and original sources are listed below.

• The Trump administration finalized the first US deep-sea mining auction off American Samoa, covering 31 million acres despite local and environmental opposition.S1

• Donald Trump has called deep-sea mining in the region a 'core' US interest. Locals and environmental groups reject that.S2