"For the first time, the U.S. Department of Defense has detailed what it views as its greatest challenges related to climate change. In a report to Congress, the Defense Department said that global warming poses a 'present security threat, not strictly a long-term risk.'"

"Federal regulators have begun a push for new cybersecurity defenses to prevent sophisticated attackers from penetrating utility control rooms and other industrial control system centers by infiltrating malware on third-party vendors' products."

"VIENNA — Iran and a group of six nations led by the United States have agreed to a historic accord to significantly limit Tehran’s nuclear ability for more than a decade in return for lifting international oil and financial sanctions against Iran, a senior Western diplomat involved in the negotiations said on Tuesday."

"The Army set out to develop lead-free bullets to protect the environment. The finished product achieved that goal -- and produced the most lethal rifle round to date."

"Hackers have made the energy industry a favorite target."

"The toxic vapors acted quickly against the Second Platoon of the 811th Ordnance Company, whose soldiers were moving abandoned barrels out of an Iraqi Republican Guard warehouse in 2003. The building, one soldier said, was littered with dead birds."

"Colombian authorities must stop using the controversial herbicide glyphosate -- also known by its brand name Roundup -- to eradicate illicit coca plantations, President Juan Manuel Santos said on Saturday."

"The National Marine Fisheries Service violated multiple environmental laws when it authorized the Navy to conduct training activities off Hawaii and Southern California, a federal judge ruled yesterday."

"About once every four days, part of the nation's power grid — a system whose failure could leave millions in the dark — is struck by a cyber or physical attack, a USA TODAY analysis of federal energy records finds."

"Oil prices rose sharply on Thursday amid concerns that fighting in the Arabian Peninsula between a Saudi-led coalition and Houthi rebels in Yemen could disrupt supplies."