Students at 2,500 schools will walk out today to protest gun violence. Meet the teen behind the event. Here's what else you need to know to Get Up to Speed and Out the Door. (You can also get "5 Things You Need to Know Today" delivered to your inbox daily. Sign up here.)

A police officer in Ludwigshafen, Germany, an industrial city in Rhineland-Palatinate, received an unusual request in March.

Ariana Grande is back.

Plunge into water at near-freezing temperatures, and your body goes into extreme distress. Your skin screams signals of pain. You can't breathe, because your chest is cramping up. Talking is nearly impossible. Your heart is pounding. Fear mounts -- as it should. Without any protection, you may lose consciousness in under 15 minutes. You'll be dead within an hour.

Purists may be horrified by the thought of an electric Ferrari, but can speed win them over?

As the first executive director and general manager of the city of Los Angeles' Department of Cannabis Regulation, Cat Packer will lay the legal foundation for how the United States' second-largest city handles marijuana. But it wasn't until three years ago, in her last semester of law school, that she even knew what she wanted to do professionally.

Congress passed the Controlled Substances Act in 1970. More than a quarter century later, a section of that law helped states to legalize marijuana.

If you smoke or eat pot, you might have encountered the "marijuana munchies," or the desire for salty, sweet or fatty carbohydrate-rich foods when using the drug.

President Donald Trump will not attend Saturday's funeral service for former first lady Barbara Bush, the White House said in a statement Thursday, citing the desire to "avoid disruptions" and out of respect for her family and friends.

Surfing legend Laird Hamilton has helped dozens of people and animals from floods in Hawaii.

LA Fitness has apologized after accusations that two black patrons at a New Jersey club were racially profiled and asked to leave. The fitness chain also promised to improve staff training.

The Bajau people of Southeast Asia, known to many as "sea nomads," are renowned for their amazing diving abilities.