Denmark has announced $4.2bn (£3.2bn) of extra defence spending to boost security in Greenland and the Arctic and North Atlantic regions. It will also spend $4.5bn buying 16 more F-35 fighter jets from the United States, bringing its total fleet of such advanced planes to 43. "With this... agreement we significantly strengthen the capabilities of the Danish Armed Forces in the region," Denmark's Defence Minister Troels Lund Poulsen said in a statement on Friday. The defence boost comes after US