Environment

FILE - In this March 5, 2004 file photo, a man walks along a path lined with elm trees in Princeton, N.J.. The recent spring-like weather has a big downside for allergy sufferers: Tree buds, the first being elms and maples, have begun releasing pollen ahead of the normal time. A report issued Monday, April 4, 2016, by the Obama Administration listed how global warming will make the air dirtier, water more contaminated and food more tainted. It warned of diseases, such as those spread by ticks and mosquitoes, longer allergy seasons, and thousands of heat wave deaths. (AP Photo/Daniel Hulshizer, File)

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In this picture taken Friday, April 1, 2016, damage is seen in the ancient city of Palmyra in the central city of Homs, Syria. Explosions rocked the ancient town of Palmyra on Friday and on the horizon, black smoke wafted behind its majestic Roman ruins, as Syrian army experts carefully detonated hundreds of mines they say were planted by Islamic State militants before they fled the town. (AP Photo)

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This NOAA satellite image taken Friday, April 1, 2016 at 12:45 AM EDT shows a cold front extending from the Great Lakes southward into the Gulf of Mexico. Severe storms will sweep across the Southeast along this cold front. Some tornadoes are possible. (NOAA/Weather Underground via AP)

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General view shows a partially collapsed overpass in Kolkata, India, Friday, April 1, 2016. The overpass spanned nearly the width of the street and was designed to ease traffic through the densely crowded Bara Bazaar neighborhood in the capital of the east Indian state of West Bengal. About 100 meters (300 feet) of the overpass fell, while other sections remained standing. (AP Photo/Bikas Das)

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American Tactical Omni-Hybrid AR-15 Pistol chambered in 5.56 mm. The new Omni-Hybrid Pistol design utilizes the Omni-Hybrid lower receiver; a fiberglass-composite polymer over a zinc metal insert. Designed to give extra strength in the high-pressure sections, the Omni-Hybrid surpasses military pressure testing. The new pistol comes complete with an Omni-Hybrid polymer lower receiver, 7" buffer tube, 7" free float quad rail, 7.5" barrel and weighs just 4.75lbs.

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North Korea's Nuclear Threat: Assessment, Global Responses and Solutions cover (March 30, 2016)

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Some arms control advocates say the international effort to curb nuclear proliferation that President Obama launched in 2010 is losing steam. (Associated Press)

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New York Attorney General Eric Schneiderman and others attorneys general are proving whether ExxonMobil deceived the public on man-made carbon dioxide emissions. (Associated Press)

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Puerto Rico Gov. Alejandro Garcia Padilla said he'll challenge in court any law that imposes an oversight board with powers to overrule local officials in response to House Republicans releasing draft legislation Tuesday to rescue the territory's crippling debt crisis. (Associated Press Photographs)

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"While most people would agree that the government should not force such actions, there has not been a single instance of such taking place in Georgia," said Georgia Gov. Nathan Deal. "If there has been any case of this type in our state it has not been called to my attention." (Associated Press)

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Then Gov. Bill Clinton and wife Hillary dance to Fleetwood Mac's "Don't Stop" - their 1992 presidential campaign theme song - during a stop that year in New Jersey. (AP file photo)

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The Jefferson Memorial is seeing through cherry blossom trees in full bloom on the tidal basin in Washington, Sunday, March 27, 2016. ( AP Photo/Jose Luis Magana) **FILE**

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Migration of Jihad Illustration by Linas Garsys/The Washington Times

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This still image taken from NASA TV shows a commercial cargo ship named Cygnus about to connect to the International Space Station on Saturday, March 26, 2016. It's the first of three shipments coming up in quick succession. A Russian cargo ship will lift off in a few days, followed by a SpaceX supply run on April 8. NASA has turned to private industry to keep the space station stocked. (NASA via AP)

MagnumResearchDesert Eagle1911U

MAGNUM RESEARCH DESERT EAGLE 1911U is built on an ultra lightweight frame made of aircraft grade aluminum alloy and features a 4140 high carbon steel slide and adjustable rear sight for windage and elevation. Standard features include checkered front and back strap, double diamond checkered wood grip, and stainless steel hex screws. The DE1911U also has a high-rise beavertail safety, skeleton hammer, and an aluminum trigger. True to the earlier 1911 variants, this model is a Series 70 configuration

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In this Oct. 3, 2012 file photo, marijuana plants are seen in Chicago where officers say they discovered two football fields worth of pot plants growing on the city's South Side. (AP Photo/Teresa Crawford, File)

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Sen. Ted Cruz in the thick of a hands-on campaign stop with voters in Idaho. (Associated Press)

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People protest outside the North Carolina Executive Mansion in Raleigh on March 24, 2016. North Carolina legislators decided to rein in local governments by approving a bill Wednesday that prevents cities and counties from passing their own anti-discrimination rules. North Carolina Gov. Pat McCrory later signed the legislation, which dealt a blow to the LGBT movement after success with protections in cities across the country. (Associated Press) **FILE**