WASHINGTON, D.C. - Circa July, 2015 - A security guard stands near the gates in front of the White House in Washington, D.C.
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Back view of Unrecognizable person in protective suit and respirator mask checking Radiation level in radioactive zone with yellow warning sign in the background
No Trespassing Sign On Chain Link Fence With City Scape In Background
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Warning sign with exclamation mark on laptop, error fault animation
Green skull and toxic sign on blue grunge texture, motion holidays, horror and Halloween style background
Danger Do Not Enter warning sign
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Beware Caution Danger Risks Threat Warning Sign Word Text 3 D Animation
Skull Warning Sign On Technology Screen Background V 04
Air Force Installation Warning Sign
Close-up of a small skin blemish
Biohazard danger symbol with a shine on black background
Aerial footage of urban borough shrouded in morning fog. Large warning sign of poisonous area. Warsaw, Poland
3D Exclamation mark animation on transparent background or alpha channel. Full HD. 4K
An orange sign at a dock chains off a ramp, warning of a restricted area.
Full shot of diverse male and female wardens preparing for wild animal migration season, Indian man putting up warning sign, and Hispanic woman closing off forest area with barricade tape
Halloween on dark dramatic and cinematic sky with cloud, motion holidays, horror and Halloween style background
Corroded metal Danger - High Voltage sign rests high on a major electrical tower
Yellow warning sign wet floor. Sign showing warning of caution wet floor and workerw cleaning hall floor of building.
A red and white wooden road block on the side of a road
exclamation mark icon Animation of a danger, Warning symbol attention with alpha channel
Friday 13th on mystical road sign with dark red blood, motion horror, mystical and cinema style background
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No smoking concept icon loop animation with alpha channel
Wrinkled skin mole close up
warning danger icon safety hazard symbol animation
Medium shot of Hispanic female environment protection officer in khaki sweatshirt and cap standing in forest and looking through binoculars, and male colleague installing warning sign in background
Out of order warning sign on broken elevator door.
Close View of the Orange Flashing Beacons During Road Works. Technology and Road Signs Concept
Ringing the iron bell: A warning message is given
A close-up view of a roadblock with red and white bollards and a "Road Closed" sign in the middle of the road.
Black grunge texture with damaged, motion holidays, horror and Halloween style background
pedestrian crossing sign yellow
Sun-burnt skin on man back
Sign in forest woods warns of ticks and lyme disease