**FILE** An AirTran jets lands as a Midwest plane is parked at Gen. Mitchell International Airport in this Jan. 11, 2007 file photo, in Milwaukee. After months of back-and-forth battling over AirTran's effort to acquire Midwest Air Group Inc., Midwest has spurned AirTran one last time by formally deciding to sell to private investment firm TPG Capital for $450 million. (AP Photo/Morry Gash, file)