Global News Roundup: Ukraine, Markets, AI Scandal & Geopolitical Tensions

• Ukraine and EU deny Moscow's claims of a drone attack on Putin's residence; US finds Kyiv not involved.
• Berkshire Hathaway shares slip on Warren Buffett's final day as CEO; Greg Abel takes over.
• ITC shares plunge to a 33-month low after cigarette excise duty hike and a block deal.
• X's Grok AI misused to morph photos of women and children into explicit content, sparking global outrage.
• Pakistan and Taiwan issue strong warnings on sovereignty amid regional military actions.

Why It Matters: A new year begins with diverse global news, from geopolitical tensions and market shifts to AI misuse.