WASHINGTON (AP) — Investigators said Wednesday that air traffic controllers cleared an Alaska Airlines jet to take off from Nashville last month after telling pilots of a Southwest Airlines jet to cross the same runway. Pilots of the Alaska plane aborted their Sept. 12 takeoff at Nashville International Airport, applying the brakes so hard that the tires deflated as they are designed to do when they get too hot. The National Transportation Safety Board gave a timeline of the incident as part of a brief preliminary report.