- "There is no evidence of a cyberattack at this point, but the President directed DOT to conduct a full investigation into the causes," the White House said.Winter storms derailed holiday travel in late December, prompting widespread cancellations and a crisis at Southwest Airlines after it buckled from all the schedule changes."There is no evidence of a cyberattack at this point, but the President directed DOT to conduct a full investigation into the causes," White House press secretary Karine Jean-Pierre said in a tweet."As the Committee prepares for FAA reauthorization legislation, we will be looking into what caused this outage and how redundancy plays a role in preventing future outages," Sen. Maria Cantwell, D-Wash., chair of the Senate Commerce Committee, said in a statement Wednesday.The incident comes just weeks after bad weather during the busy holiday travel period prompted mass flight disruptions across the U.S. and days later, more than 15,000 Southwest flight cancellations after the carrier's internal systems were unable to process all the schedule changes."