FILE - In this May 5, 2015, file photo, a marijuana plant grows at a Minnesota Medical Solutions greenhouse in Otsego, Minn. (Glen Stubbe/Star Tribune via AP)

Marijuana laws could loosen nationwide

Doctors in 23 states can prescribe medical marijuana, but they cannot legally study how it affects illnesses. That could change soon.

This aerial view shows a Southern California social services center in San Bernardino, Calif., where authorities said multiple people were shot Wednesday, Dec. 2, 2015. (KTTV via AP)

Photos: Shooting in San Bernardino

Multiple people were shot on Dec. 2, 2015 at a California social services center, and police were searching for up to three gunmen.