"A new report finds the railroad cars that transport the toxic gas around the United States are vulnerable to accidents and sabotage."

"The United States is monitoring Iraq's largest dam for signs of further deterioration that could point to an impending catastrophic collapse, US army officers said on Thursday."

"CHESAPEAKE, Va. -- High levels of contaminants from a firefighting foam that was used for decades at Fentress Naval Auxiliary Landing Field were found in its well water during a recent laboratory test, leading Navy officials Wednesday to tell workers to drink only bottled water until a permanent solution is available."

"On Jan. 20, the U.S. Department of the Navy will host a kickoff event, launching the first vessels of its Great Green Fleet at the San Diego Naval Air Station North Island, Carrier Pier. The GGF centerpiece is a carrier strike group—including an aircraft carrier and Arleigh Burke-class destroyer—deploying using energy conservation technologies, operating procedures and alternative energy in the course of its regular scheduled deployment in 2016."

"Leading Republican presidential candidates are condemning the armed takeover of a federal wildlife refuge in Oregon and distancing themselves from the gunmen."

"The Bundy family of Nevada joined with hard-core militiamen Saturday to take over the headquarters of the Malheur National Wildlife Refuge, vowing to occupy the remote federal outpost 30 miles southeast of Burns [Oregon] for years."

"Iranian hackers infiltrated the control system of a small dam less than 20 miles from New York City two years ago, sparking concerns that reached to the White House, according to former and current U.S. officials and experts familiar with the previously undisclosed incident."

"LOS ALAMOS, N.M. - The $2 billion contract to manage one of the federal government's premier nuclear weapons laboratories will be up for grabs after 2017."

"Kemal Ali ran a successful well-digging business for farmers in northern Syria for 30 years. He had everything he needed for the job ... Then things changed. In the winter of 2006–2007, the water table began sinking like never before."

"Islamic State is looking at potentially vulnerable oil assets in Libya and elsewhere outside its Syria stronghold, where the militant group controls about roughly 80 percent of the oil and gas fields, a senior U.S. official said on Tuesday."