The U.S. Department of Transportation (USDOT) is initiating a review of how the top 10 largest U.S. airlines handle, collect, and use passengers' personal information. This move comes in response to concerns about potential privacy violations and misuse of passenger data by airlines. The investigation aims to ensure that airlines comply with data security and privacy regulations, with a focus on protecting passengers' privacy rights while traveling. The USDOT's inquiry is seen as a positive step towards safeguarding consumer privacy in the airline industry, with support from lawmakers and the Biden Administration.