Production. Mercury. Drilling blast holes with a compressed air rock drill in a California mercury mine of the New Idria… https://www.rawpixel.com/image/12302829/image-plant-person-womanFree Image from public domain licenseOffice of Civilian Defense workers help protect nation's capital. Ever on the alert during patrol, the air raid warden is… https://www.rawpixel.com/image/12304064/image-person-fire-wallFree Image from public domain license[Untitled photo, possibly related to: Daniel Field, Georgia. Air Service Command. Enlisted men learning close order drill].… https://www.rawpixel.com/image/12308088/image-person-public-domain-manFree Image from public domain licenseU.S. Soldiers assigned to the 3rd U.S. Infantry Silent Drill Team perform during the 2012 National Football League Pro Bowl… https://www.rawpixel.com/image/8742177/photo-image-public-domain-peopleFree Image from public domain licenseFirefighter checking the wellbeing of a simulated patient during a drill. Original public domain image from Flickr https://www.rawpixel.com/image/4040898/vigilant-guard-2015-south-carolinaFree Image from public domain licenseA U.S. Army combat engineer with the 810th Engineer Company, Joint Task Force 781, Georgia National Guard assists the… https://www.rawpixel.com/image/4040895/photo-image-person-public-domainFree Image from public domain licenseRaymond Cifelli, a civilian fire protection specialist from the New Jersey Air National Guard's 177th Fighter Wing, assists… https://www.rawpixel.com/image/3581559/free-photo-image-177th-civil-engineeringFree Image from public domain licenseLititz, Pennsylvania. "Bosser" Kreider, day policeman, during an air raid drill. Sourced from the Library of Congress. https://www.rawpixel.com/image/12338557/image-face-person-public-domainFree Image from public domain licenseLititz, Pennsylvania. "Bosser" Kreider, day policeman, during an air raid drill. Sourced from the Library of Congress. https://www.rawpixel.com/image/12338738/image-face-person-skyFree Image from public domain licenseA U.S. Sailor assigned to Air Department simulates an aircraft fire during a mass casualty drill on the flight deck of the… https://www.rawpixel.com/image/8741442/photo-image-fire-public-domain-personFree Image from public domain license[Untitled photo, possibly related to: Daniel Field, Georgia. Air Service Command. Sign posted by the decontamination squad… https://www.rawpixel.com/image/12336711/image-plant-grass-smokeFree Image from public domain licenseU.S. Air Force Airman 1st Class Jordan Shields of the Air Force Honor Guard drill team warms up prior to a performance at… https://www.rawpixel.com/image/3318313/free-photo-image-air-force-memorial-architectureFree Image from public domain licenseU.S. Marine Corps Cpl. Octavious Lee, a driver with Weapons Company, Battalion Landing Team, 2nd Battalion, 1st Marines… https://www.rawpixel.com/image/8741499/photo-image-light-public-domain-personFree Image from public domain licenseAir Force junior ROTC cadets compete in the annual Top Gun Drill Meet hosted by the South Carolina Air National Guard at… https://www.rawpixel.com/image/4043156/photo-image-public-domain-american-flagFree Image from public domain licenseU.S. Marines with 2nd Air Naval Gunfire Liaison Company (2d ANGLICO) conduct tactical beach landing drills with 148 Battery… https://www.rawpixel.com/image/8739201/photo-image-public-domain-beach-personFree Image from public domain licenseU.S. Navy Petty Officer 1st Class Wanda Sangalang, left, a field medical technician, and Petty Officer 3rd Class Anthony… https://www.rawpixel.com/image/8741341/photo-image-public-domain-personFree Image from public domain licenseHigh School junior ROTC cadets from across S.C. compete in 12 drill and ceremony events during the annual Top Gun Drill Meet… https://www.rawpixel.com/image/4043150/photo-image-person-shoeFree Image from public domain licenseAirman 1st Class Anthony Walters, 5th Maintenance Squadron aircraft structural maintenance, drills a rivet atop the wing of… https://www.rawpixel.com/image/3318657/free-photo-image-mxs-afbFree Image from public domain licenseA U.S. Marine with Special Purpose Marine Air-Ground Task Force-Crisis Response-Africa 19.1, Marine Forces Europe and… https://www.rawpixel.com/image/8741609/photo-image-fires-public-domain-personFree Image from public domain licenseGOODFELLOW AFB, Texas - Airmen from the 312th Training Squadron extinguish a fire on a training module to demonstrate an… https://www.rawpixel.com/image/8728194/photo-image-fire-public-domain-personFree Image from public domain licenseProduction. Airplane propellers. Hamilton propeller blades for our warships of the air are placed into a Barnes multiple… https://www.rawpixel.com/image/12306470/image-plant-person-airplaneFree Image from public domain licenseNew Idria, California. Drilling blast holes with a compressed-air rock drill in one of the workings of the New Idria… https://www.rawpixel.com/image/12339218/image-person-public-domain-manFree Image from public domain licenseU.S. Marines assigned to the Silent Drill Platoon practice a drill sequence in preparation for a performance at Marine Corps… https://www.rawpixel.com/image/8742327/photo-image-public-domain-personFree Image from public domain license[Untitled photo, possibly related to: Lititz, Pennsylvania. Volunteer firemen called out during an air raid drill]. Sourced… https://www.rawpixel.com/image/12338730/image-people-public-domain-manFree Image from public domain licenseThe South Carolina Air National Guard is hosting its Junior Reserve Officers’ Training Corps Top Gun Drill Meet with nearly… https://www.rawpixel.com/image/4043843/photo-image-person-public-domainFree Image from public domain licenseThe annual Top Gun Drill Meet at McEntire Joint National Guard Base, S.C., April 28, 2018. https://www.rawpixel.com/image/4043137/photo-image-people-teamFree Image from public domain licenseU.S. Air Force Capt. Travis Hunt, a tactical air control party specialist and commanding officer of Detachment 1, 3rd Air… https://www.rawpixel.com/image/11071882/photo-image-person-fire-public-domainFree Image from public domain licenseU.S. Air Force Senior Airman Christian Dye, a tactical air control party specialist assigned to Detachment 1, 3rd Air… https://www.rawpixel.com/image/11071869/photo-image-hand-person-fireFree Image from public domain licenseU.S. Soldiers compete in the ruck march event at the 2018 U.S. Army Reserve Best Warrior Competition at Fort Bragg, North… https://www.rawpixel.com/image/8727801/photo-image-light-public-domain-personFree Image from public domain licenseLititz, Pennsylvania. Fire Captain Raymond Runk during an air raid drill. Sourced from the Library of Congress. https://www.rawpixel.com/image/12291257/photo-image-face-hand-personFree Image from public domain licenseLititz, Pennsylvania. Air raid wardens and Red Cross worker on duty outside a hotel during an air raid drill. The man on the… https://www.rawpixel.com/image/12290286/photo-image-person-cross-public-domainFree Image from public domain licenseLititz, Pennsylvania. Volunteer firemen practicing during an air raid drill. Sourced from the Library of Congress. https://www.rawpixel.com/image/12291269/photo-image-face-hand-personFree Image from public domain licenseDaniel Field, Georgia. Air Service Command. Enlisted men learning close order drill. Sourced from the Library of Congress. https://www.rawpixel.com/image/12296087/photo-image-person-public-domain-manFree Image from public domain licenseLititz, Pennsylvania. Part of the Lititz fire department called out during an air raid drill. Sourced from the Library of… https://www.rawpixel.com/image/12291529/photo-image-person-fire-treeFree Image from public domain license[Untitled photo, possibly related to: Lititz, Pennsylvania. Volunteer firemen practicing during an air raid drill]. Sourced… https://www.rawpixel.com/image/12290266/photo-image-face-person-skyFree Image from public domain licenseLititz, Pennsylvania. Volunteer firemen called out during an air raid drill. Sourced from the Library of Congress. https://www.rawpixel.com/image/12291509/photo-image-face-people-public-domainFree Image from public domain license[Untitled photo, possibly related to: Daniel Field, Georgia. Air Service Command. Enlisted men learning close order drill].… https://www.rawpixel.com/image/12296091/photo-image-face-people-public-domainFree Image from public domain licenseLititz, Pennsylvania. Air raid wardens on duty and passersby taking shelter in the bank doorway during an raid drill.… https://www.rawpixel.com/image/12291801/photo-image-person-road-public-domainFree Image from public domain licenseLititz, Pennsylvania. Volunteer firemen practicing in a vacant lot during an air raid drill. Sourced from the Library of… https://www.rawpixel.com/image/12290265/photo-image-person-sky-baseballFree Image from public domain licenseLititz, Pennsylvania. Emergency policemen outside their headquarters during an air raid drill. Sourced from the Library of… https://www.rawpixel.com/image/12290283/photo-image-people-public-domain-manFree Image from public domain licenseU.S. Marines with Bravo Battery, 1st Battalion, 10th Marine Regiment, 2nd Marine Division provide security during a CH-53… https://www.rawpixel.com/image/8727920/photo-image-fire-public-domain-peopleFree Image from public domain licenseLititz, Pennsylvania. Air raid wardens outside of the bank during an air raid drill. On left is Mr. Pennepacker, the barber.… https://www.rawpixel.com/image/12290289/photo-image-person-public-domain-manFree Image from public domain license[Untitled photo, possibly related to: Lititz, Pennsylvania. Air raid wardens and Red Cross worker on duty outside a hotel… https://www.rawpixel.com/image/12290015/photo-image-people-cross-public-domainFree Image from public domain license[Untitled photo, possibly related to: Daniel Field, Georgia. Air Service Command. Enlisted men learning close order drill].… https://www.rawpixel.com/image/12296351/photo-image-face-person-public-domainFree Image from public domain licenseLititz, Pennsylvania. "Bosser" Kreider, day policeman, during an air raid drill. Sourced from the Library of Congress. https://www.rawpixel.com/image/12291479/photo-image-face-people-treeFree Image from public domain licenseLititz, Pennsylvania. Volunteer fireman rolling up hose during a practice air raid drill. Sourced from the Library of… https://www.rawpixel.com/image/12291535/photo-image-person-public-domain-manFree Image from public domain licenseLititz, Pennsylvania. During an air raid drill, the fire department was also called out. Sourced from the Library of… https://www.rawpixel.com/image/12291478/photo-image-shadow-people-fireFree Image from public domain license[Untitled photo, possibly related to: Lititz, Pennsylvania. Part of the Lititz fire department called out during an air raid… https://www.rawpixel.com/image/12289970/photo-image-face-person-fireFree Image from public domain licenseLititz, Pennsylvania. Volunteer firemen practicing during an air raid drill. Sourced from the Library of Congress. https://www.rawpixel.com/image/12291540/photo-image-face-person-baseballFree Image from public domain licenseLititz, Pennsylvania. Emergency policemen outside their headquarters during an air raid drill. Sourced from the Library of… https://www.rawpixel.com/image/12291517/photo-image-face-people-public-domainFree Image from public domain license