President Barack Obama views the area near the Treasury during a walking tour of the ancient city of Petra in Jordan, March… https://www.rawpixel.com/image/4050315/photo-image-person-nature-buildingFree Image from public domain license"I was on the second helicopter which landed minutes before Marine One, and then photographed the President's helicopter as… https://www.rawpixel.com/image/4051577/photo-image-person-bird-natureFree Image from public domain licenseU.S. Army PV2 Tonio Velentine with the 173rd Airborne Brigade Combat Team (ABCT) pulls security for his mortar team at the… https://www.rawpixel.com/image/4043247/photo-image-plant-nature-grassFree Image from public domain licenseMultinational special operations forces members ride aboard U.S. Navy rigid-hull inflatable boats toward a cruise ship… https://www.rawpixel.com/image/3319387/free-photo-image-apparel-aqaba-governorateFree Image from public domain licenseA U.S. Marine with Battalion Landing Team, 1st Battalion, 6th Marine Regiment, 22nd Marine Expeditionary Unit (MEU) shoots… https://www.rawpixel.com/image/3319220/free-photo-image-army-apparel-armoredFree Image from public domain licenseU.S. Marines and Sailors assigned to Lima Company, Battalion Landing Team, 3rd Battalion, 2nd Marine Regiment, 26th Marine… https://www.rawpixel.com/image/3318405/free-photo-image-combat-arms-26th-meu-certain-force-uncertain-worldFree Image from public domain licenseU.S. Marines assigned to Fox Company, Battalion Landing Team, 2nd Battalion, 6th Marine Regiment, 26th Marine Expeditionary… https://www.rawpixel.com/image/3318382/free-photo-image-5th-marine-expeditionary-brigade-accessoryFree Image from public domain licenseU.S. Marines assigned to Fox Company, Battalion Landing Team, 2nd Battalion, 6th Marine Regiment, 26th Marine Expeditionary… https://www.rawpixel.com/image/3318294/free-photo-image-soldier-exerciseFree Image from public domain licenseCostumed characters at the 1863 Battle of Gettysburg, in Pennsylvania. Original image from Carol M. Highsmith’s… https://www.rawpixel.com/image/3093116/free-photo-image-1863-battle-america-civil-warFree Image from public domain license