The suspect in a Georgia school shooting was investigated over previous school shooting threats. A Los Angeles community is stricken by accelerating landslides. And how Nvidia’s $297 billion loss rattled the stock market.

Here’s what to know today.

Two students and two teachers killed in Georgia school shooting; 14-year-old suspect arrested

Authorities identified the two teachers and two students killed in a shooting yesterday at Apalachee High School, located about an hour outside of…