Environment

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U.S. Air Force Combat Controllers and U.S. Army Pathfinders land in a field conducting Drop Zone surveys for future air drop sites in a U.S. Navy HH-60 on January 24, 2010 in Port au Prince, Haiti during Operation Unified Response. (U.S. Air Force photo by Master Sgt. Jeremy Lock) (Released)

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U.S. Air Force Combat Controllers and U.S. Army Pathfinders land in a field and are conducting Drop Zone surveys for future air drop sites on January 24, 2010 in Port au Prince, Haiti during Operation Unified Response. (U.S. Air Force photo by Master Sgt. Jeremy Lock) (Released)

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U.S. Air Force Combat Controllers and U.S. Army Pathfinders land in a field conducting Drop Zone surveys for future air drop sites in a U.S. Navy HH-60 on January 24, 2010 in Port au Prince, Haiti during Operation Unified Response. (U.S. Air Force photo by Master Sgt. Jeremy Lock) (Released)

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Democratic presidential candidate Sen. Bernie Sanders, I-Vt., listens as an audience member poses a question at a Newport Town Hall Breakfast Sunday, Dec. 29, 2019, at the Newport Opera House in Newport, N.H. (AP Photo/Cheryl Senter)

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Scientists are aggressively pursuing a vaccine to the mosquito-borne Zika virus and using special bacteria to neutralize the mosquitoes that carry the disease. (ASSOCIATED PRESS)

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I'm sorry, but we do not accept damaged goods ... (Illustration by Michael Ramirez for Creators Syndicate)

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This summer 2018 file photo provided by the National Oceanic and Atmospheric Administration shows the U.S. Coast Guard Icebreaker Healy on a research cruise in the Chukchi Sea of the Arctic Ocean. (Devin Powell/NOAA via AP, File)

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Marine Raiders navigate a Combat Rubber Raid Craft during a nighttime Visit, Board, Search and Seizure preparation near Mobile, Alabama. The VBSS was part of a 10-day exercise in the Gulf Coast region to maintain unit readiness. (U. S. Marine Corps photo by Gunnery Sgt. Joshua S. Higgins/Released)

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A Marine Special Operations Team member fires a M240B machine gun during night fire sustainment training in Helmand province, Afghanistan, March 28, 2013. Marine Special Operations Team members are deployed in Helmand province to train and mentor Afghan National Security Forces. (U.S. Marine Corps photo by Sgt. Pete Thibodeau)

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Marines with Marine Corps Special Operations Command conduct a Special Patrol Insertion/Extraction excercise on a CH-53E aboard Marine Corps Base Camp Lejeune, N.C., Sept. 13, 2013. This training has helped the MARSOC MPC program in developing what will become the standard operating procedures. (U.S. Marine Corps photo by Sgt. Anthony Carter/Released)

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A Marine with Individual Training Course, Marine Special Operations School, Marine Corps Forces, Special Operations Command, patrols through a forest during a fire and maneuver exercise Sept. 24, 2010 aboard Camp Lejeune, NC. The exercise was the culminating event of a weapons and tactics package the course conducted that week. (Official U.S. Marine Corps photo by Lance Cpl. Thomas W. Provost/Released)

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Peace on Earth, goodwill towards men. (Illustration by Michael Ramirez for Creators Syndicate)

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A Mississippi River bonfire in the shape of an alligator ready for lighting. (Special to The Washington Times/courtesy of Stephen Peytavin.)

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BEST OF 2019 - In this Friday, Jan. 18, 2019, image made from video provided by the Survival Media Agency, a teenager wearing a "Make America Great Again" hat, center left, stands in front of an elderly Native American singing and playing a drum in Washington. (Survival Media Agency via Associated Press) **FILE**