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"Human beings are the only species that deliberately deprive themselves of sleep for no apparent gain," says sleep scientist Matthew Walker, author of Why We Sleep. Originally broadcast Oct. 17, 2017.

The duck boat carrying 31 people capsized during a severe storm that produced gusts of at least 60 mph. Divers worked through the night on rescue and recovery operations.

The Ramirez family tried to seek asylum in the U.S. The dad says he was deported, but his son and wife are being held in the U.S. in separate facilities.

Carole Cadwalladr's investigation into Cambridge Analytica's role in Brexit led her to Russian connections and the Trump campaign. She says British investigators are working "closely with the FBI."

A survey of anesthesiologists found that 95 percent say it is impacting patient care. Surgeons, emergency medicine physicians, intensive care unit doctors are also impacted.

President Trump boasts that he's tougher on Russia than any other president. His administration has adopted some tough policies, even though Trump's rhetoric is almost always friendly toward Moscow.