Live coverage of the news conference regarding the machete attack Friday night (March 20) inside the Louis Armstrong New Orleans International Airport starts here: New Orleans Mayor Mitch Landrieu: "We're going to learn a lot from this incident." Jefferson Parish Sheriff Newell Normand: "We accomplished a lot of things last night with assistance of Kenner police, FBI, ATF and others." Normand clarifies some inaccuracies reported by sheriff's office last night. Says no traveler was grazed by a bullet as originally reported. TSA agent was being chased by Richard White as he waved the machete. JSPO lieutenant's first shot wounded female...