Slovenian Ground Force soldiers, left, form a defensive line against role players portraying rioting Kosovar civilians… https://www.rawpixel.com/image/8742340/photo-image-public-domain-people-lineFree Image from public domain licenseSecretary of Defense Robert M. Gates and Canadian Minister of National Defense Peter MacKay tour Halifax Citadel in Nova… https://www.rawpixel.com/image/8741700/photo-image-public-domain-person-meetingFree Image from public domain licenseU.S. Navy Landing Craft, Air Cushion 84, attached to Assault Craft Unit 4, enters the well deck of the San Antonio-class… https://www.rawpixel.com/image/8728363/photo-image-public-domain-boatFree Image from public domain licenseA U.S. Coast Guard rescue swimmer is dropped into Grand Traverse Bay during a rescue demonstration at the National Cherry… https://www.rawpixel.com/image/8728293/photo-image-public-domain-bird-animalFree Image from public domain licenseButterfly, Regal Fritillary and Great Spangled Firtillary. Free public domain CC0 photo. https://www.rawpixel.com/image/6202195/photo-image-flower-leaf-public-domainFree Image from public domain licenseBeautiful oak leaf background, Autumn aesthetic. Free public domain CC0 photo. https://www.rawpixel.com/image/6197945/photo-image-background-aesthetic-designFree Image from public domain licenseClassroomSiuslaw National Forest Historic Photos. Original public domain image from Flickr https://www.rawpixel.com/image/4075380/photo-image-room-living-bedroomFree Image from public domain licenseBO.CARDCombined front and back view of the "Bo" baseball card, which is available to download as a pdf file from… https://www.rawpixel.com/image/4050212/photo-image-plant-dog-grassFree Image from public domain licenseSparky - the electric bison!Sparky is one tough bison! 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Original public domain image from Flickr https://www.rawpixel.com/image/4034966/photo-image-tree-plant-birdFree Image from public domain licenseShafer TrailFog lingers above Shafer Trail. Credit: NPS/Cadence C. Cook. Original public domain image from Flickr https://www.rawpixel.com/image/4033682/photo-image-art-painting-natureFree Image from public domain licenseWhite Rim PatrolCredit: NPS/Neal Herbert. Original public domain image from Flickr https://www.rawpixel.com/image/4037745/photo-image-person-public-domainFree Image from public domain licenseOnce thought to be extinct, the northern elephant seal has made a remarkable comeback along the Pacific Coast. https://www.rawpixel.com/image/3397951/free-photo-image-animal-california-cc0Free Image from public domain licenseSunrise during the U.S. Department of Agriculture (USDA) and U.S. Environmental Protection Agency (EPA) sponsored National… https://www.rawpixel.com/image/3306461/free-photo-image-21st-community-localFree Image from public domain licenseAn elk forages in the northernmost Wyoming reaches of Yellowstone National Park. 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