President Donald Trump's push to acquire Greenland has fueled concerns about U.S. reliability as NATO appears increasingly divided. Subscribe to ABC News on YouTube: https://abcnews.visitlink.me/59aJ1G ABC News is your daily source of breaking national and world news, exclusive interviews and 24/7 live streaming coverage. https://abcnews.go.com/ Download the ABC News app for the latest headlines and alerts: https://abcnews.go.com/devices Connect with ABC News on social media: Facebook: https://

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