It was chaos as thousands of visitors rushed out of New Orleans but, on Monday, security crews were in high spirits: after all of the fears and and all of the planning, Super Bowl LIX had passed without major catastrophe.
Swift's previous visit during her 'Eras Tour' served as a useful dry run; the New Year's attack was - in the words of one security expert - a 'wake-up call'.
A sniper stands guard atop a building across the street from the Superdome in New Orleans.
At one entrance to Bourbon Street, there was a haunting memorial to the 14 people killed, when Shamsud-Din Jabbar rammed his truck into revelers celebrating New Year's Eve.
Taylor Swift, the girlfriend of Travis Kelce, was also in the crowd in New Orleans on Sunday.