Do mass shootings cause more mass shootings? Research is divided.

2017 in review: The ‘Wonder’-filled highs (and lows) of the year in movies

USA TODAY looks at the highs (‘Wonder Woman’) and lows (‘Valerian and the City of a Thousand Planets’) of the year’s movies.

Shooter among dead in New Mexico high school shooting

Two students were killed when a shooter opened fire at Aztec High School.

Nativity scene and Christmas tree unveiled at the Vatican

Nativity scene and Christmas tree unveiled at the Vatican Video provided by AFP