**FILE** A Midwest plane taxis past a parked AirTran plane at Gen. Mitchell International Airport in this Jan. 11, 2007 file photo, in Milwaukee. Midwest Air Group Inc. thought it had successfully spurned AirTran Holdings Inc.'s takeover bids and would be flying in smooth skies once again. After months of wrangling, Midwest was ready to enter into a definitive agreement Wednesday, Aug. 15, 2007 to accept private investment firm TPG Capital's $400 million cash bid. But more turbulence came late Tuesday when AirTran revived its hostile takeover effort, increasing its bid to $16.25 per share in a cash and stock deal worth about $445 million. (AP Photo/Morry Gash, file)