An NRCS Wetlands Reserve Program easement on the Lost Trail National Wildlife Refuge will restore the natural meander to… https://www.rawpixel.com/image/3335567/free-photo-image-acep-agricultural-conservation-easement-program-airfieldFree Image from public domain licenseAir pollution due to burning fire. Original public domain image from Flickr https://www.rawpixel.com/image/3335223/free-photo-image-volcano-air-buildingFree Image from public domain licenseThe new plasma arc facility at the AEC's Sandia Laboratories, Albuquerque, New Mexico, simulates the extremely high… https://www.rawpixel.com/image/3322863/free-photo-image-arc-cc0-creative-commonsFree Image from public domain licensePower generation facility and CSP receiver, part of Solar Reserve's Crescent Dunes facility in Tonopah, NV. Original public… https://www.rawpixel.com/image/3322713/free-photo-image-building-cc0-creative-commonsFree Image from public domain licenseHelicopter on Loxahatchee prescribed fire. Original public domain image from Flickr https://www.rawpixel.com/image/3326211/free-photo-image-aircraft-animal-birdFree Image from public domain licenseAircraft fly overhead during the 2019 EAA AirVenture Oshkosh July 25, 2019, in Oshkosh, Wisconsin. https://www.rawpixel.com/image/3306834/free-photo-image-air-aircraft-airplaneFree Image from public domain licenseU.S. Army Sgt. Anthony Orduno, a UH-60 Black Hawk helicopter crew chief with Bravo Company, 1st Battalion, 140th Aviation… https://www.rawpixel.com/image/3306953/free-photo-image-california-military-artFree Image from public domain licenseA prescribed burn in the U.S. Department of Agriculture (USDA) Forest Service (FS) Arapaho and Roosevelt National Forests… https://www.rawpixel.com/image/3306806/free-photo-image-arapaho-and-roosevelt-arapaho-burningFree Image from public domain license(PERSONNEL ARE FOLLOWING SAFETY PROTOCOLS) U.S. Department of Agriculture (USDA) Forest Service (USFS) Kaibab National… https://www.rawpixel.com/image/3306867/free-photo-image-burning-cc0-countrysideFree Image from public domain licenseA person cooking food over a smokey barbeque in Vinaròs. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3337319/free-photo-image-advertisement-aircraft-airplaneFree Image from public domain licenseWhite smoke trails behind four small airplanes flying close to each other. Original public domain image from Wikimedia… https://www.rawpixel.com/image/3337184/free-photo-image-aeroplane-aircraft-airfoilFree Image from public domain licenseCityscape of Tokyo, view from Tokyo Skytree. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3338807/free-photo-image-aerial-view-architecture-buildingFree Image from public domain licensePlant Pollution in the town of Karabash, Chelyabinsk Oblast, Russia. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3338520/free-photo-image-building-cc0-creative-commonsFree Image from public domain licenseU.S. Soldiers with the 44th Chemical Company, 2nd Chemical Battalion, 48th Chemical Brigade, based out of Fort Hood, Texas… https://www.rawpixel.com/image/3319230/free-photo-image-2014-44th-86thFree Image from public domain licenseA U.S. Marine with Black Sea Rotational Force 17.1 demonstrates the importance of staying calm while exiting a structure… https://www.rawpixel.com/image/3319517/free-photo-image-1st-battalion-marines-apparel-armoredFree Image from public domain licenseMembers of the French Foreign Legion conduct urban operations as part of Exercise Bold Alligator 17 at Military Operations… https://www.rawpixel.com/image/3319471/free-photo-image-2ndmardiv-2ndmeb-2ndmlgFree Image from public domain licenseU.S. Army paratroopers assigned to 1st Battalion, 503rd Infantry Regiment, 173rd Airborne Brigade quickly move towards an… https://www.rawpixel.com/image/3319091/free-photo-image-7th-army-training-command-7thatc-adventureFree Image from public domain licenseJacob Welwell, an Alaska Division of Forestry firefighter, extinguishes a prescribed burn May 3, 2018, at the Infantry… https://www.rawpixel.com/image/3319097/free-photo-image-alaska-apparel-cc0Free Image from public domain licenseU.S. Marines with the 2nd Battalion, 23rd Marine Regiment fire a Mk 153 Shoulder-Launched Multipurpose Assault Weapon (SMAW)… https://www.rawpixel.com/image/3319450/free-photo-image-apparel-armored-armyFree Image from public domain licenseLos Angeles firefighter Ivan Del-Ril is instructed by Camp Pendleton fire captain Brian Gilmore on how to control fire… https://www.rawpixel.com/image/3319105/free-photo-image-apparel-bonfire-californiaFree Image from public domain licenseU.S. Marines and Soldiers assigned to Special Purpose Marine Air-Ground Task Force 7 fortify border fencing along the… https://www.rawpixel.com/image/3319125/free-photo-image-alloy-wheel-apparel-astronautFree Image from public domain licensePhilippine Marines carry a casualty to their extraction point while conducting an amphibious raid during KAMANDAG 2 on… https://www.rawpixel.com/image/3319109/free-photo-image-apparel-armored-armyFree Image from public domain licenseA Republic of Korea Airman assists with decontamination operations during the ROK/U.S. https://www.rawpixel.com/image/3319163/free-photo-image-korea-11th-fighter-wing-7th-air-forceFree Image from public domain licenseU.S. Army Sgt. 1st Class Jeremy Carver, assigned to Bravo Company, Recruiting and Retention Battalion, Oregon Army National… https://www.rawpixel.com/image/3319051/free-photo-image-arkansas-armored-armyFree Image from public domain licenseA U.S. Soldier a takes part in a training event, showcasing for the secretary of the Army the skills Soldiers acquire and… https://www.rawpixel.com/image/3319108/free-photo-image-people-museum-apparel-armoredFree Image from public domain licenseU.S. Air Force Airman 1st Class Bruce Lovett (left) and Staff Sgt. Robert Washington (right), 633rd Civil Engineering… https://www.rawpixel.com/image/3318842/free-photo-image-astronaut-cc0-creative-commonsFree Image from public domain license130213-O-ZZ999-207.PACIFIC OCEAN (Feb. 13, 2013) A Standard Missile-3 (SM-3) Block 1A interceptor is launched from the… https://www.rawpixel.com/image/3318070/free-photo-image-america-ready-bonfireFree Image from public domain licenseU.S. Marine MV-22 Ospreys with the 22nd Marine Expeditionary Unit land before embarking Marines and Sailors as part of… https://www.rawpixel.com/image/3318330/free-photo-image-adventure-aircraft-airplaneFree Image from public domain licenseFARGO, N.D. 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Shoes must be forged to fit on each horse's hoof… https://www.rawpixel.com/image/3318820/free-photo-image-banister-cc0-creative-commonsFree Image from public domain licenseThe 40-foot recreational craft Invictus burns on the water north of Protection Island, Wash., June 11, 2018. https://www.rawpixel.com/image/3318768/free-photo-image-oil-spill-battleship-boatFree Image from public domain licenseA U.S. Air Force F-22 Raptor aircraft assigned to the 90th Fighter Squadron performs aerial maneuvers over Joint Base… https://www.rawpixel.com/image/3318298/free-photo-image-aircraft-airplane-alaskaFree Image from public domain licenseU.S. Marine Corps recruits with November Company, 4th Battalion, Recruit Training Regiment, test their gas masks inside the… https://www.rawpixel.com/image/3318515/free-photo-image-golf-apparel-architectureFree Image from public domain licenseThe Frecce Tricolori, the Italian Aeronatica Militare's aerobatic demonstration team, performs Nov. 10, 2015 at the 2015… https://www.rawpixel.com/image/3318206/free-photo-image-aircraft-airplaneFree Image from public domain licenseA Cal Fire helicopter releases fire retardant during the U.S. Marine Corps Base Camp Pendleton-hosted Wildland Firefighting… https://www.rawpixel.com/image/3318166/free-photo-image-adventure-aircraft-airfieldFree Image from public domain licenseA U.S. Navy MH-60S Sea Hawk helicopter assigned to the Indians of Helicopter Sea Combat Squadron (HSC) 6, fires flares… https://www.rawpixel.com/image/3318340/free-photo-image-aircraft-carrier-airplaneFree Image from public domain licenseU.S. Air Force Thunderbirds pilots perform the Line to Diamond Loop maneuver during the Warriors over the Wasatch air show… https://www.rawpixel.com/image/3318312/free-photo-image-air-force-aircraft-airplaneFree Image from public domain licenseU.S. Navy Steelworker 2nd Class Samuel Rojas, assigned to Naval Mobile Construction Battalion 4, currently with Task Force… https://www.rawpixel.com/image/3318684/free-photo-image-apparel-building-cc0Free Image from public domain licenseU.S. Marines and Japan Ground Self-Defense Force members disembark a MV-22 Osprey at Hokkaido, Japan, August 18, 2017, in… https://www.rawpixel.com/image/3317940/free-photo-image-gunship-marine-life-1st-aircraft-wingFree Image from public domain licenseU.S. Soldiers of 82nd Airborne Brigade prepare to breach a barricade while conducting a crowd riot control scenario during a… https://www.rawpixel.com/image/3318542/free-photo-image-7th-army-training-command-bayern-cc0Free Image from public domain licenseU.S. Air Force Airman 1st Class Ross Keserich, a firefighter with the 374th Civil Engineering Squadron, performs hydraulic… https://www.rawpixel.com/image/3317896/free-photo-image-crowd-apoap-artFree Image from public domain licenseSoldiers with the 25th Infantry Division call for a medical evacuation by utilizing red smoke while conducting assaults in a… https://www.rawpixel.com/image/3318241/free-photo-image-army-bush-cc0Free Image from public domain licenseU.S. Soldiers with Battle Group Poland conduct Urban Breach training near the Bemowo Piskie Training Area, Poland, during… https://www.rawpixel.com/image/3318261/free-photo-image-soldier-15th-mechanized-brigade-2nd-cavalry-regimentFree Image from public domain licenseAsh on the Lake McDonald beach in Apgar. Original public domain image from Flickr https://www.rawpixel.com/image/3310097/free-photo-image-ash-cc0-creative-commonsFree Image from public domain licenseFirefighter looks over scorched area of Soberanes Fire checking for hot spots. https://www.rawpixel.com/image/3306473/free-photo-image-fire-firefighterFree Image from public domain license(PERSONNEL ARE FOLLOWING SAFETY PROTOCOLS) U.S. Department of Agriculture (USDA) Forest Service (USFS) Kaibab National… https://www.rawpixel.com/image/3307155/free-photo-image-apparel-clothing-coatFree Image from public domain licenseCity signs reading "buses only" and "no smoking". Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3295557/free-photo-image-banister-brown-background-busFree Image from public domain licenseMollis, Schweiz. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3295372/free-photo-image-aeroplane-air-display-aircraftFree Image from public domain licenseBlack and white drone shot of Sutro Tower emerging from thick clouds. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3296120/free-photo-image-buildings-cc0-creative-commonsFree Image from public domain licenseLong shot of misty Golden Gate Bridge in San Francisco with busy daytime traffic. Original public domain image from… https://www.rawpixel.com/image/3295731/free-photo-image-arch-arched-architectureFree Image from public domain licenseThick fog over the treetops in a forest. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3287369/free-photo-image-cc0-creative-commonsFree Image from public domain licenseA person in a jacket faces away toward white smoke outdoors in Iceland. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3295949/free-photo-image-apparel-back-basinFree Image from public domain licensePlane over Sydney. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3296674/free-photo-image-airplane-silhouette-adventure-aircraftFree Image from public domain licenseBeautiful aesthetic sky backgorund. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3296380/free-photo-image-cloudy-above-cloud-aerial-viewFree Image from public domain licenseBlack and white shot of urban sprawl from natural area with trees. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3288213/free-photo-image-aerial-view-building-bushFree Image from public domain licenseBlack and white photo of fog rolling down a hillside.. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3288067/free-photo-image-cc0-countryside-creative-commonsFree Image from public domain licenseDjúpivogur, Iceland. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3296388/free-photo-image-cc0-creative-commonsFree Image from public domain licenseA man in a black hat walking away from a suitcase with red smoke coming out of it. Original public domain image from… https://www.rawpixel.com/image/3288851/free-photo-image-alone-apparel-best-backgroundFree Image from public domain licenseŠpindlerův Mlýn, Czechia. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3289341/free-photo-image-abies-aerial-view-cc0Free Image from public domain licenseBridge disappears into mist on a foggy day in Stockholm. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3297683/free-photo-image-buildings-cc0-creative-commonsFree Image from public domain licenseSingle isolated sign sits in eerie still waters covered in clouds. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3289484/free-photo-image-animal-bird-cc0Free Image from public domain licenseLave meets water. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3298536/free-photo-image-awesome-cc0-creative-commonsFree Image from public domain licenseDramatic view of the beach with rough winds and windmills in the background. Original public domain image from Wikimedia… https://www.rawpixel.com/image/3289711/free-photo-image-smog-beach-images-pictures-cc0Free Image from public domain licenseMarple Bridge, United Kingdom. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3298921/free-photo-image-airplane-smoke-trail-airFree Image from public domain licenseSmoke is coming out of a chimney of a factory.. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3289975/free-photo-image-architecture-beacon-buildingFree Image from public domain license