US Secretary of State Marco Rubio said on Tuesday that Iceland had long been a “critical outpost” for security during a visit to the island, as his country pushed for greater US influence in the Arctic region. His trip comes after US President Donald Trump has stirred up the power balance in the region by making threats to buy or annex Greenland. The United States signed a security pact with Denmark and Greenland in late September that will allow Washington to establish two new military bases...