News of the day from around the nation, Dec. 7

Heavily armed sheriff’s deputies stood watch Tuesday at a Los Angeles-area subway station named in an unconfirmed threat and Mayor Eric Garcetti took the line to work to show confidence in security measures.

Temporary barriers were in place at the entrance to the Red Line station near Universal Studios and some commuters were subjected to bag searches as deputies stood by with rifles and dogs.

Surveys show a small but growing number of older adults are using marijuana — a trend that worries researchers who say not enough information exists about how pot affects older users.

Researchers at New York University say pot could pose health challenges to older users ranging from memory loss to risk of falling.

3 Baby mix-up: A Minnesota woman filed a lawsuit against a health care provider after her newborn was mistakenly given to another mother at a hospital and breastfed.

New York’s governor has launched an investigation into racial bias in the state prison system following an investigation by the New York Times.