US President Donald Trump, Danish Prime Minister Mette Frederiksen and Greenland Prime Minister Jens-Frederik Nielsen signed a new defence agreement, updating a 1951 pact and expanding security cooperation in the strategically important Arctic region. (Pics/AFP)

Large swathes of the United States continue to reel under an intense cold wave, with freezing conditions expected to hold firm well into the coming week, according to weather reports. (Pics/AFP)