Hundreds of troops have moved into New Orleans as Hurricane Isaac has turned from a tropical storm into a hurricane.

From Reuters:

Brandishing automatic assault rifles to ward off any threat of looting, the troops in military vehicles took up positions on mostly deserted streets. Their arrival came as driving rain and stiff winds began battering the city’s iconic French Quarter and its boarded-up storefronts.

An reader sent the following image of an armored vehicle patrolling the French Quarter:

It is not certain Isaac will be a repeat of Katrina. During the latter storm, the police confiscated guns, rogue cops murdered people and looted stores, and FEMA did its best to turn a bad situation into an unmitigated nightmare.