Greenland essential to US international security, says President Trump #Greenland is vital for the United States to ensure international security, US President Donald #Trump said in an interview with Vince Coglianese. "We need Greenland for international safety and security. We need it. We have to have it. And it's an island that from a defensive posture and even an offensive posture is something that we need, especially with the world the way it is, and we're going to have to have it. And so I hate to put it that way, but we're going to have to have it," the US leader said.