A section of the aircraft ripped off midair in the incident. Photo: Elizabeth Le/Associated PressIt has been more than two days since Alaska Airlines Flight 1282 made an emergency landing after a section of the aircraft ripped off midair, leaving a hole in the plane at 16,000 feet. Here’s what we know so far about an investigation that officials from the National Transportation Safety Board kicked off into the incident.At this point, the probe is focused on the Alaska incident and not on a broader set of ai ...