American travelers are outraged by signs appearing at US airports appearing to allow migrants onto flights without showing proper identification. US citizens traveling domestically have to show a valid identification card or a passport to board a plane, but signs at certain airports say there are different rules for some newly arrived migrants. The signs claim the Transport Security Administration is working with Customs and Border Protection to “validate adult non-US citizen travel documentation when the traveler does not otherwise have an acceptable form of identification.” In practice, this means migrants who have entered the country using the CBP One...