Tehran appoints Mojtaba Khamenei as successor to his late father as the IDF begins a ground operation targeting Hezbollah infrastructure in southern Lebanon. Amid soaring energy costs and a global market sell-off, oil prices have eclipsed $100 US a barrel for the first time in more than three years. »»» 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/