Which major airline underwent a complete rebranding in 2003, changing its name from ValuJet to AirTran following a deadly crash in 1996 that severely damaged its reputation?

The transportation industry has seen many airlines undergo significant rebranding efforts to stay competitive or recover from negative publicity. These transformations often involve new visual identities, service philosophies, and sometimes complete name changes. Test your knowledge of major airline rebranding initiatives that changed the course of these transportation companies' histories.

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AirTran Airways (formerly ValuJet)
Frontier Airlines (formerly Mountain Air Express)
JetBlue Airways (formerly NewAir)
Spirit Airlines (formerly Charter One)