Harbor patrol personnel and lifeguards appeared to take turns holding the horse's head up.

CNN: Horse rescued after swimming 2 miles into ocean

That's what happened to a 7-year-old white Arabian named William, said Santa Barbara Harbor Patrol Officer Ryan Kelly.

CNN: Horse rescued after swimming 2 miles into ocean

In the first episode of our "Upgrade" series, Motherboard goes to Rotterdam to watch Harada's ragtag team of scientists and engineers as they hustle to assemble the first Protei prototype and dodge the Dutch harbor patrol for their first water test.

CNN: Robotic sailboats built to clean up oil spills