To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Share Embed Share URL Video File Node URL Embed Code <iframe title="MRC TV video player" width="640" height="360" src="https://www.mrctv.org/embed/3134" allowfullscreen></iframe> ‘Nightly News’ uses claims in government report, with ‘low to medium confidence’ in the accuracy to conclude climate change is a threat to national security.
