Scott Lucas, international politics professor at University College Dublin, says the U.S.-proposed ceasefire plan is welcome, but many details will still need to be fleshed out, including disarmament, the restoration of aid and security arrangements. »»» 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: