1. A 14-year-old boy killed two fellow students and two teachers and wounded nine others in a shooting at a Georgia high school.

2. President Xi Jinping pledged to step up Chinese support to Africa with funding of nearly $51 billion, backing for more infrastructure initiatives and a promise to create at least 1 million jobs.

3. The first legally binding international AI treaty will be open for signing by the countries which negotiated it, including European Union members, the US and Britain.

4. The Biden administration told Nippon Steel in a letter its $14.9 billion acquisition of U.S. Steel would pose a national security risk.

5. BYD is rolling out electric-vehicle charging stations and ramping up marketing and customer incentives in Japan.