Dubai is a critical hub for humanitarian aid, now frozen as the war in the Middle East expands. A humanitarian emergency adviser for World Vision says the escalation could worsen a pre-existing crisis. »»» Subscribe to CBC News to watch more videos: http://bit.ly/1RreYWS For breaking news, video, audio and in-depth coverage: https://www.cbc.ca/news Follow CBC News on TikTok: https://www.tiktok.com/@cbcnews Subscribe to CBC News on Snapchat: https://bit.ly/3leaWsr Subscribe to CBC News on