FILE - In this July 8, 2015 file photo, United Airlines planes are parked at their gates as another plane, top, taxis past them at George Bush Intercontinental Airport in Houston. U.S. airlines have ramped up an aggressive lobbying campaign that seeks nothing less than converting the government from industry regulator to business ally. The big three legacy carriers, Delta, American and United, want the Obama administration to protect them from competition from foreign airlines, arguing those rivals can undercut ticket prices thanks to government subsidies or cheaper labor. (AP Photo/David J. Phillip, File)