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STK108052M © Stocktrek Images, Inc. Navy soldier pushes himself out of the pool during a relay swim race.
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Navy soldier pushes himself out of the pool during a relay swim race.
STK108333M © Stocktrek Images, Inc. Retired Navy special warfare service members practice their swimming.
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Retired Navy special warfare service members practice their swimming.
STK204642S © Stocktrek Images, Inc. Astronauts await the start of a spacewalk training session.
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Astronauts await the start of a spacewalk training session.
STK204647S © Stocktrek Images, Inc. Astronauts simulate a spacewalk in the Neutral Buoyancy Laboratory.
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Astronauts simulate a spacewalk in the Neutral Buoyancy Laboratory.
STK204648S © Stocktrek Images, Inc. Astronaut simulates a spacewalk in the Neutral Buoyancy Laboratory.
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Astronaut simulates a spacewalk in the Neutral Buoyancy Laboratory.
TMO100824M © Stocktrek Images, Inc. Washington Monument at sunset, Washington D.C., USA.
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Washington Monument at sunset, Washington D.C., USA.
TMO100574M © Stocktrek Images, Inc. Washington Monument at sunset, viewed from the Lincoln Memorial.
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Washington Monument at sunset, viewed from the Lincoln Memorial.
TMO100575M © Stocktrek Images, Inc. Washington Monument at sunset, Washington D.C., USA.
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Washington Monument at sunset, Washington D.C., USA.
TMO100578M © Stocktrek Images, Inc. Washington Monument at sunset, Washington D.C., USA.
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Washington Monument at sunset, Washington D.C., USA.
TMO100579M © Stocktrek Images, Inc. Lincoln Memorial reflection in pool, Washington D.C., USA.
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Lincoln Memorial reflection in pool, Washington D.C., USA.
MME400008U © Stocktrek Images, Inc. Blind shark, Blue Zoo Aquarium, Beijing, China.
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Blind shark, Blue Zoo Aquarium, Beijing, China.
MME400098U © Stocktrek Images, Inc. Leopard Shark Courting, Blue Zoo Aquarium, Beijing, China.
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Leopard Shark Courting, Blue Zoo Aquarium, Beijing, China.
MME400099U © Stocktrek Images, Inc. Leopard Shark Courting, Blue Zoo Aquarium, Beijing, China.
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Leopard Shark Courting, Blue Zoo Aquarium, Beijing, China.
MME400100U © Stocktrek Images, Inc. Leopard Shark, Blue Zoo Aquarium, Beijing, China.
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Leopard Shark, Blue Zoo Aquarium, Beijing, China.
MME400170U © Stocktrek Images, Inc. Sand Tiger Shark, Blue Zoo Aquarium, Beijing, China.
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Sand Tiger Shark, Blue Zoo Aquarium, Beijing, China.
MME400171U © Stocktrek Images, Inc. Sand Tiger Shark, Blue Zoo Aquarium, Beijing, China.
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Sand Tiger Shark, Blue Zoo Aquarium, Beijing, China.
CLA100052S © Stocktrek Images, Inc. Star trails of many different autumn constellations over Alentejo, Portugal.
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Star trails of many different autumn constellations over Alentejo, Portugal.
RRS300270S © Stocktrek Images, Inc. Champagne Pool hot spring, Wai-O-Tapu Geothermal area, Taupo Volcanic Zone, New Zealand.
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Champagne Pool hot spring, Wai-O-Tapu Geothermal area, Taupo Volcanic Zone, New Zealand.
RRS300377S © Stocktrek Images, Inc. Pond for collecting spring water, Kawah Ijen Volcano, Java, Indonesia.
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Pond for collecting spring water, Kawah Ijen Volcano, Java, Indonesia.
STK203073S © Stocktrek Images, Inc. An astronaut is submerged in the water while wearing a Extravehicular Mobility Unit spacesuit.
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An astronaut is submerged in the water while wearing a Extravehicular Mobility Unit spacesuit.
MME400087U © Stocktrek Images, Inc. Iceberg swimming pool, Antarctica.
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Iceberg swimming pool, Antarctica.
STK102832M © Stocktrek Images, Inc. U.S. Air Force Airmen participate in a Mounted Operations exercise.
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U.S. Air Force Airmen participate in a Mounted Operations exercise.
STK101955M © Stocktrek Images, Inc. A U.S. Marine swims across a training tank pool.
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A U.S. Marine swims across a training tank pool.
VET200074S © Stocktrek Images, Inc. Pool table with balls and one of them as planet Earth.
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Pool table with balls and one of them as planet Earth.
VET200075S © Stocktrek Images, Inc. Pool table with balls and one of them as planet Earth.
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Pool table with balls and one of them as planet Earth.