San Antonio International Airport becomes the most recent addition to the Global Entry program, a volunteer initiative by CBP that allows certain travelers, including U.S. citizens, U.S. lawful permanent residents, and Mexican nationals, upon return to the U.S. after travel abroad, to complete customs declaration forms, and verify entry documents and identity at automated self-service kiosks rather than the usual passport control lines. Enrollment into Global Entry must be done in advance of travel via submission of an online application and $100 fee payment, as well as in-person interview and fingerprinting by a CBP officer at an enrollment center. Global Entry program membership is valid for up to five years at a time.