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A Durango & Silverton Narrow-Guage Scenic Railroad train, pulled by a vintage steam locomotive, crosses an alpine bridge in San Juan County, Colorado. Original image from Carol M. Highsmith’s America, Library of Congress collection. Digitally enhanced by
by Free Public Domain Illustrations by rawpixel
by Free Public Domain Illustrations by rawpixel

This image, taken April 9, 2010, shows the test radar affixed to a gimbal mounting at the front of a helicopter, carrying an engineering test model of the landing radar for NASA's Mars Science Laboratory. Original from NASA . Digitally enhanced by raw
by Free Public Domain Illustrations by rawpixel
by Free Public Domain Illustrations by rawpixel

Lights appear in the crawler-transporter under the mobile launcher, or ML, as its 4.2-mile, day-long trek from Launch Pad 39B to the park site near the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida ends in darkness. Original from
by Free Public Domain Illustrations by rawpixel
by Free Public Domain Illustrations by rawpixel

In Orbiter Processing Facility-2 at NASA's Kennedy Space Center in Florida, the flight deck of space shuttle Atlantis is lit one last time as preparations are made for the Space Shuttle Program transition and retirement activities. Original from NASA
by Free Public Domain Illustrations by rawpixel
by Free Public Domain Illustrations by rawpixel

Under the unflinching summer sun, workers at NASA's Deep Space Network complex in Goldstone, Calif., use a crane to lift a runner segment that is part of major surgery on a giant, 70-meter-wide antenna. Original from NASA . Digitally enhanced by rawpi
by Free Public Domain Illustrations by rawpixel
by Free Public Domain Illustrations by rawpixel

Volunteers portraying astronauts are transported to ambulances as part of a Mode II-IV evacuation simulation exercise at NASA Kennedy Space Center's Launch Pad 39A, which conducted by The Space Shuttle Program and U.S. Air Force. Original from NASA. D
by Free Public Domain Illustrations by rawpixel
by Free Public Domain Illustrations by rawpixel

A Lockheed Martin technician performs tube welding on the Orion crew module for Exploration Flight Test 1 inside a clean room processing cell in the Operations and Checkout Building high bay at NASA’s Kennedy Space Center in Florida. Original from NASA .
by Free Public Domain Illustrations by rawpixel
by Free Public Domain Illustrations by rawpixel

Dusk shot of barges traversing a short canal that connects the Sabine Pass waterway separating Texas from Louisians, and the Trinity River, south of Port Arthur, Texas. Original image from Carol M. Highsmith’s America, Library of Congress collection. Digi
by Free Public Domain Illustrations by rawpixel
by Free Public Domain Illustrations by rawpixel
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