The U.S. Department of Transportation (DOT) has opened an investigation into Delta Air Lines, after receiving hundreds of complaints over canceled and delayed flights that started when the CrowdStrike outage last week caused technological chaos worldwide. U.S. Transportation Secretary Pete Buttigieg announced the news on X on Tuesday, saying that the investigation is “to ensure the airline is following the law and taking care of its passengers during continued widespread disruptions.” [time-brightcove not-tgx=”true”] The announcement comes after Buttigieg said in a post on X on Sunday that the DOT received hundreds of complaints about the airline over “continued disruptions and unacceptable customer service conditions.” “I have made clear to Delta that we will hold them to all applicable passenger protections,” Buttigieg said in Sunday’s post.