Among the less-liquid carriers with a free float of more than 50%, Air France-KLM, Turk Hava Yollari AO, and SAS AB still retain government shareholdings that might be called upon to help out in a crisis; Qantas Airways Ltd. and Deutsche Lufthansa AG have a history of state ownership which may serve the same purpose; and Korean Air Lines Co. and Asiana Airlines Inc. have historically been indulged within South Korea's chaebol system of conglomerates. The three most prominent players left — major U.S. carriers Delta Air Lines Inc., American Airlines Group Inc. and United Airlines Holdings Inc. — saw their shares surge this week after Congress moved through a bailout bill providing around $25 billion of support. Still, that amount would only cover about six months of liabilities, and their competitors would likely want a piece of the action too.