 Listen to the Mighty 990 with the new KWAM mobile app. Download it now at Mighty990.com for Apple or Google Play. Your direct access to everything KWAM. CBS News Brief. It's being called the largest IT outage in history, and it could affect your flight, your surgery, and even your paycheck. It was caused by a faulty software update. CBS's Chris Van Cleave at the airport in Phoenix. In some cases, airlines were handwriting tickets to get passengers on their way.