https://www.theverge.com/2018/9/20/17884476/facial-recognition-scan-delta-flight-atlanta-international-airport > Delta will soon use facial recognition for international flights at the Hartsfield-Jackson Atlanta International Airport later this year. Biometric face scanning will be optional, meant as an option to save travelers time from checking in, as spotted by TechCrunch. > Those who don’t want their faces scanned could always opt out, but the option is only given to US citizens. Visitors will need to be scanned as a security measure. The data will be collected and stored for two weeks, although exit records will last for over a decade for citizens and green card holders, and over seven decades for visitors.