A rare occurrence but not that first for southwest airlines. this happened in 2016. same engine, same airline and damage short of a window puncture. on the left, 2016. on the right, yesterday's engine. eerie similarities. a complete investigation could take up to a year. >> neil: thanks very much. let's dip into this press conference here. >> an indication in the cockpit for engine vibration. it increased significantly on the left engine. shortly thereafter the cabin attitude warning horn activated. from my experience of flying a 737, i can tell you that that warning activates around 13,500, 1...