Gas prices in the U.S. have risen for nine straight weeks.
Kirstjen Nielsen's replacement, U.S. Customs and Border Protection Commissioner Kevin McAleenan, who will serve as acting secretary, also defended Border Patrol's use of tear gas to repel migrants.
Eight people are dead and more than 30 are still missing after an apartment block exploded in Magnitogorsk, Russia.
"Mr. Bernhardt has represented mining and extraction companies, developers, and oil and gas interests," wrote 150 environmental advocacy groups in a letter.
"The CS gas we deploy is standard law enforcement issue," Kevin McAleenan told CNN, contradicting the president's claim that border agents had used a "minor form" of the chemical agent.
Use of tear gas is prohibited in war, yet it is regularly used against civilian populations around the world.
The "people's food basket has shrunk, except for the profiteers of sanctions," said one civil servant living in Tehran.
The U.S. announced that China, Greece, India, Italy, Japan, South Korea, Taiwan and Turkey would be granted a six-month exemption from sanctions on buying Iranian oil.
Several firefighters were reportedly injured, according to local news outlets.
While the oil and gas industry is making significant bets on a wide range of energy technologies, it is also focusing on digital technologies that promise to transform enterprises as fundamentally as in other sectors. Download the full report to learn more.
Iran's threat to shut down the Strait of Hormuz is unlikely to be carried out, but it would prompt a spike in oil prices and potential U.S. military intervention.
The retired four-star general shifted in his seat and looked away as Trump branded Germany a "captive" of Russia, but the White House says he was simply underwhelmed by the catering.
Top diplomats from China, the EU, France, Germany, Iran, Russia and the U.K. believe the nuclear deal "is in the security interest of all."
Volcanic ash continued to sputter from a volcano on Hawaii's Big Island, raising health concerns about exposure to the toxic plumes.