The promise from authorities for more security threatened to conflict with the city’s anything-goes sensibilities, and some changes were evident.

With Mardi Gras celebrations under way, the city of New Orleans is ramping up security measures in response to the heightened threat level following the New Year's Day attack on Bourbon Street. Law enforcement agencies at the local,

Three parades will roll Thursday night in New Orleans with scores of masked riders on colorful floats. More processions will continue every day through Mardi Gras, or Fat Tuesday. Costumed revelers will jam the French Quarter as more parades roll in New Orleans’ suburbs, other Louisiana cities, and all along the Mississippi and Alabama coasts.

With Mardi Gras just days away, New Orleans is boosting security to historic levels after a terror attack on the city's Bourbon Street killed 14 people on New Year's Day. NBC News' Jesse Kirsch has more.