As New Orleans seeks to recover from the deadly, Islamic State-inspired truck attack, law enforcement and community leaders are confronting an existential question as old as the city's famed entertainment district: Can Bourbon Street be protected in a way that preserves the round-the-clock revelry?

By the time Shamsud-Din Jabbar swerved onto Bourbon Street at 3:17 a.m. on New Year’s Day, his plan seemed to have been taking shape for months. But for those who narrowly escaped his deadly three-block rampage,