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Harriet Hanson Robinson portrait, Lowell National Historical Park, 2016.

Harriet Hanson Robinson portrait, Lowell National Historical Park, 201...

Harriet Hanson Robinson worked as a bobbin doffer in the Lowell Mills starting at the tender age of 10 in 1835. In her autobiography, "Loom & Spindle", she proudly recounts leading a group of other workers out ... More

Impeachment committee in the U.S. House of Representatives, Lowell National Historical Park, 2016.

Impeachment committee in the U.S. House of Representatives, Lowell Nat...

Exact date unknown. These men belonged to the impeachment committee in the U.S. House of Representatives. Benjamin Butler, President Johnson's fiercest opponent and later Governor of Massachusetts and president... More

Civil War General Benjamin Butler, Lowell National Historical Park, 2016.

Civil War General Benjamin Butler, Lowell National Historical Park, 20...

Exact date unknown. Benjamin Butler was a fierce and unrelenting critic of President Johnson, who had taken office following the death of Abraham Lincoln. Chief among the 'high crimes and misdemeanors' cited in... More

Frederick Douglass portrait, New Bedford Whaling National Historical Park , 1860.

Frederick Douglass portrait, New Bedford Whaling National Historical P...

Frederick Douglass said, "If the Negro knows enough to pay taxes to support the government, he knows enough to vote; taxation and representation should go together. If he knows enough to shoulder a musket and f... More

CAPE CANAVERAL, Fla. -- NASA astronaut Megan McArthur takes part in a crew equipment interface test CEIT in order to become familiar with the Space Exploration Technologies Corp. SpaceX Dragon capsule prior to its scheduled April 30 liftoff. The interface test inside a processing hangar at Cape Canaveral Air Force Station's Space Launch Complex-40 was part of prelaunch preparations for the company's next demonstration test flight for NASA's Commercial Orbital Transportation Services COTS program. Under COTS, NASA has partnered with two private companies to launch cargo safely to the International Space Station.    CEIT is an activity that dates back to NASA's Space Shuttle Program, providing astronauts on Earth an opportunity to work with the actual hardware they would use in space. This exercise gave astronauts and engineers the opportunity to assess the compatibility of the equipment and systems aboard Dragon with the procedures to be used by the flight crew and flight controllers once the capsule is berthed at the space station. For more information, visit www.nasa.gov/exploration/commercial/cargo/spacex_index.html. Image courtesy: SpaceX/Paul Bonness KSC-2012-1931

CAPE CANAVERAL, Fla. -- NASA astronaut Megan McArthur takes part in a ...

CAPE CANAVERAL, Fla. -- NASA astronaut Megan McArthur takes part in a crew equipment interface test CEIT in order to become familiar with the Space Exploration Technologies Corp. SpaceX Dragon capsule prior to ... More

CAPE CANAVERAL, Fla. -- NASA astronaut Megan McArthur, right, takes part in a crew equipment interface test CEIT in order to become familiar with the Space Exploration Technologies Corp. SpaceX Dragon capsule prior to its scheduled April 30 liftoff. The interface test inside a processing hangar at Cape Canaveral Air Force Station's Space Launch Complex-40 was part of prelaunch preparations for the company's next demonstration test flight for NASA's Commercial Orbital Transportation Services COTS program. Under COTS, NASA has partnered with two private companies to launch cargo safely to the International Space Station. Jason Tenenbaum, with SpaceX Mission Operations, left, also takes part in the test.        CEIT is an activity that dates back to NASA's Space Shuttle Program, providing astronauts on Earth an opportunity to work with the actual hardware they would use in space. This exercise gave astronauts and engineers the opportunity to assess the compatibility of the equipment and systems aboard Dragon with the procedures to be used by the flight crew and flight controllers once the capsule is berthed at the space station. For more information, visit www.nasa.gov/exploration/commercial/cargo/spacex_index.html. Image courtesy: SpaceX/Paul Bonness KSC-2012-1929

CAPE CANAVERAL, Fla. -- NASA astronaut Megan McArthur, right, takes pa...

CAPE CANAVERAL, Fla. -- NASA astronaut Megan McArthur, right, takes part in a crew equipment interface test CEIT in order to become familiar with the Space Exploration Technologies Corp. SpaceX Dragon capsule p... More

CAPE CANAVERAL, Fla. -- NASA astronaut Megan McArthur, foreground, takes part in a crew equipment interface test CEIT in order to become familiar with the Space Exploration Technologies Corp. SpaceX Dragon capsule prior to its scheduled April 30 liftoff. The interface test inside a processing hangar at Cape Canaveral Air Force Station's Space Launch Complex-40 was part of prelaunch preparations for the company's next demonstration test flight for NASA's Commercial Orbital Transportation Services COTS program. Under COTS, NASA has partnered with two private companies to launch cargo safely to the International Space Station. Jason Tenenbaum, with SpaceX Mission Operations, background, also takes part in the test.      CEIT is an activity that dates back to NASA's Space Shuttle Program, providing astronauts on Earth an opportunity to work with the actual hardware they would use in space. This exercise gave astronauts and engineers the opportunity to assess the compatibility of the equipment and systems aboard Dragon with the procedures to be used by the flight crew and flight controllers once the capsule is berthed at the space station. For more information, visit www.nasa.gov/exploration/commercial/cargo/spacex_index.html. Image courtesy: SpaceX/Paul Bonness KSC-2012-1930

CAPE CANAVERAL, Fla. -- NASA astronaut Megan McArthur, foreground, tak...

CAPE CANAVERAL, Fla. -- NASA astronaut Megan McArthur, foreground, takes part in a crew equipment interface test CEIT in order to become familiar with the Space Exploration Technologies Corp. SpaceX Dragon caps... More

CAPE CANAVERAL, Fla. -- NASA astronaut Megan McArthur, center, takes part in a crew equipment interface test CEIT in order to become familiar with the Space Exploration Technologies Corp. SpaceX Dragon capsule prior to its scheduled April 30 liftoff. The interface test inside a processing hangar at Cape Canaveral Air Force Station's Space Launch Complex-40 was part of prelaunch preparations for the company's next demonstration test flight for NASA's Commercial Orbital Transportation Services COTS program. Under COTS, NASA has partnered with two private companies to launch cargo safely to the International Space Station. United Space Alliance technicians, Dan Nelson, left, and Chris Hardcastle, right, show McArthur two power connectors that are similar to the ones astronauts will use to provide power to Dragon once at the station.    CEIT is an activity that dates back to NASA's Space Shuttle Program, providing astronauts on Earth an opportunity to work with the actual hardware they would use in space. This exercise gave astronauts and engineers the opportunity to assess the compatibility of the equipment and systems aboard Dragon with the procedures to be used by the flight crew and flight controllers once the capsule is berthed at the space station. For more information, visit www.nasa.gov/exploration/commercial/cargo/spacex_index.html. Image courtesy: SpaceX/Paul Bonness KSC-2012-1933

CAPE CANAVERAL, Fla. -- NASA astronaut Megan McArthur, center, takes p...

CAPE CANAVERAL, Fla. -- NASA astronaut Megan McArthur, center, takes part in a crew equipment interface test CEIT in order to become familiar with the Space Exploration Technologies Corp. SpaceX Dragon capsule ... More

CAPE CANAVERAL, Fla. -- NASA astronaut Megan McArthur, right, takes part in a crew equipment interface test CEIT in order to become familiar with the Space Exploration Technologies Corp. SpaceX Dragon capsule prior to its scheduled April 30 liftoff. The interface test inside a processing hangar at Cape Canaveral Air Force Station's Space Launch Complex-40 was part of prelaunch preparations for the company's next demonstration test flight for NASA's Commercial Orbital Transportation Services COTS program. Under COTS, NASA has partnered with two private companies to launch cargo safely to the International Space Station. Jason Tenenbaum, with SpaceX Mission Operations, left, also takes part in the test.      CEIT is an activity that dates back to NASA's Space Shuttle Program, providing astronauts on Earth an opportunity to work with the actual hardware they would use in space. This exercise gave astronauts and engineers the opportunity to assess the compatibility of the equipment and systems aboard Dragon with the procedures to be used by the flight crew and flight controllers once the capsule is berthed at the space station. For more information, visit www.nasa.gov/exploration/commercial/cargo/spacex_index.html. Image courtesy: SpaceX/Paul Bonness KSC-2012-1932

CAPE CANAVERAL, Fla. -- NASA astronaut Megan McArthur, right, takes pa...

CAPE CANAVERAL, Fla. -- NASA astronaut Megan McArthur, right, takes part in a crew equipment interface test CEIT in order to become familiar with the Space Exploration Technologies Corp. SpaceX Dragon capsule p... More

History of Chandra X-Ray Observatory

History of Chandra X-Ray Observatory

This is an artist's concept of the Chandra X-Ray Observatory (CXO), formerly Advanced X-Ray Astrophysics Facility (AXAF), fully developed in orbit in a star field with Earth. In 1999, the AXAF was renamed the C... More

History of Chandra X-Ray Observatory

History of Chandra X-Ray Observatory

This is a computer rendering of the fully developed Chandra X-Ray Observatory (CXO), formerly Advanced X-Ray Astrophysics Facility (AXAF). In 1999, the AXAF was renamed the CXO in honor of the late Indian-Ameri... More

History of Chandra X-Ray Observatory

History of Chandra X-Ray Observatory

This photograph shows a TRW technician inspecting the completely assembled Chandra X-ray Observatory (CXO) in the Thermal Vacuum Chamber at TRW Space and Electronics Group of Redondo Beach, California. The CXO ... More

Wizard Island Summer - National Parks Gallery

Wizard Island Summer - National Parks Gallery

Image Courtesy of National Park Service

C. Mount Mazama After the Cataclysmic Eruption

C. Mount Mazama After the Cataclysmic Eruption

Paul Rockwood Painting. Image Courtesy of National Park Service, Original Located in Crater Lake National Park Museum and Archives Collections.

Crater Lake & Wizard Island in Winter

Crater Lake & Wizard Island in Winter

Image Courtesy of National Park Service

TR in Western Gear - Public Domain image, National Parks Gallery

TR in Western Gear - Public Domain image, National Parks Gallery

A young Theodore Roosevelt poses in a New York City photographer’s studio wearing western-style clothing. Image courtesy of the Library of Congress.

Hillman Peak, National Parks Wildflowers

Hillman Peak, National Parks Wildflowers

Image Courtesy of National Park Service Picryl description: Public domain photograph of National Park, nature, free to use, no copyright restrictions image.

Wizard Island in Summer - Public Domain image, National Parks Gallery
Aerial View of Crater Lake in Winter

Aerial View of Crater Lake in Winter

Image Courtesy of National Park Service.

Crater Lake in Fog - Public Domain image, National Parks Gallery

Crater Lake in Fog - Public Domain image, National Parks Gallery

Image Courtesy of National Park Service Picryl description: Public domain photograph of National Park, nature, free to use, no copyright restrictions image.

A. Mount Mazama at the Height of Its Glory

A. Mount Mazama at the Height of Its Glory

Paul Rockwood Painting. Image Courtesy of National Park Service, Original Located in Crater Lake Museum and Archives Collections.

B. Mount Mazama Erupting - Public Domain image, National Parks Gallery

B. Mount Mazama Erupting - Public Domain image, National Parks Gallery

Paul Rockwood Painting. Image Courtesy of National Park Service, Original in Crater Lake National Park Museum and Archives Collections.

Phantom Ship in Crater Lake - Public Domain image, National Parks Gallery