TIMERY SHANTE NANCE is an African-American woman who has a thing about her hair. “I don’t use chemicals or straighteners,” she said. “It’s just my natural texture, and I wear it in a normal-looking puff.”
Ms. Nance was departing from the airport in San Antonio in late July. After she passed through the body scanner, she said, a female T.S.A. screener told her to stand facing her possessions. “You’re good to go, but first I have to pat your hair,” the officer told her, she said.