U.S. to examine Southwest Airlines cancellations, calls 'unacceptable
US government to review 'unacceptable' cancellations by Southwest Airlines as travel chaos continues
Southwest travelers lash out amid widespread delays - The Boston Globe
Southwest Cancels More Flights, Draws Federal Investigation
Southwest Airlines' holiday meltdown brings on federal investigation
Flight Cancellations Leave Christmas Travelers Stranded at Love Field – NBC 5 Dallas-Fort Worth
Southwest's outdated technology is to blame for travel chaos that has grounded 64% of its flights
Flight chaos across US could continue for a decade: report
Southwest travel problems continue into Thursday