LAS VEGAS — The official slogan of Las Vegas, “What happens here, stays here,” is back by popular demand.

The destination’s tourism agency revived the 15-year-old slogan this week, three months after it was put on hold following the October mass shooting.

The slogan is included in a new ad running online and on TV networks, including Travel Channel, Food Network and USA.

Cathy Tull is senior vice-president of marketing for the Las Vegas Convention and Visitors Authority. She says testing results showed the slogan still resonates with people.

The ad shows some of the city’s casino-hotels as part of a time-travel story line.

On Oct. 1, a high-stakes gambler killed 58 people and injured hundreds more after shattering the windows of his hotel suite and unleashing gunfire on a music festival below.