https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/8739255Edit ImageSaveSaveEditCropCustom TextA U.S. Customs and Border Protection officer and his canine prepare to inspect a tractor trailer at the Otay Mesa, Calif., port of entry June 23, 2016.CBP Photo by Glenn Fawcett. Original public domain image from FlickrMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseEditorial use only JPEGBanner JPEG 1200 x 800 px | 300 dpiLarge JPEG 3500 x 2333 px | 300 dpiBest Quality JPEG 5760 x 3840 px | 300 dpiFree DownloadA U.S. Customs and Border Protection officer and his canine prepare to inspect a tractor trailer at the Otay Mesa, Calif., port of entry June 23, 2016.More