In the shadow of armored vehicles and packs of police, a party slowly began to take shape and New Orleans felt like the Big Easy once more: Break dancers spun on the pavement. A woman walked her cat down the street.

The blame game has started with the Bourbon Street terrorist attack in New Orleans. Why it matters: Officials are seeking answers to how someone could plow a truck through the city's most famous street when millions have been spent to keep it safe.