FILE – This Aug. 23, 2017, file photo provided by U.S. Customs and Border Protection shows an agent holding a male Bengal tiger cub that was confiscated at the U.S. border crossing at Otay Mesa southeast of downtown San Diego. 18-year-old Luis Valencia was sentenced Tuesday, Feb. 20, 2018, to six months in prison for smuggling in the cub from Mexico. (U.S. Customs and Border Protection via AP, File)