Human error behind glitch that caused 11,000 flights to be delayed across the country’s airports, say investigators
US planes were grounded nationwide last week because a contractor “unintentionally deleted files” on a crucial computer server used by pilots, investigators found.
The glitch led to travel chaos with more than 11,000 flights delayed and at least 1,300 cancelled on Jan 11.
The blunder marked the first time since the 9/11 attacks that flights across the US were grounded.
