New Zealand authorities said on Sunday that extra aircraft were being sent to fight an out-of-control wildfire that has burnt through around 1,100 hectares (4.2 square miles) of national park in the country’s central North Island.Firefighters began battling the fire in Tongariro National Park, a popular hiking spot, on Saturday afternoon and around 40 hikers had to be airlifted to safety. However, firefighting efforts were suspended overnight for safety reasons.Fire and Emergency New Zealand...