NASA says the chances of a direct hit by asteroid 2024 YR4, which could be the size of a football field, keep shifting. CBC News’s Johanna Wagstaffe and Sarah Galashan discuss what people should watch for. Read more: http://www.cbc.ca/1.7451123 »»» Subscribe to CBC News to watch more videos: http://bit.ly/1RreYWS Connect with CBC News Online: For breaking news, video, audio and in-depth coverage: http://bit.ly/1Z0m6iX Follow CBC News on TikTok: https://bit.ly/3TnHioe Follow CBC News on Twitter:

Tag-uri: Twitter