A tour of the Geothermal House of the CERAWeek energy conference in Houston this week. Geothermal energy is emerging as one of the big green winners of the current era.

A Transportation Security Administration checkpoint at O’Hare International Airport in Chicago last week on the first day of the government shutdown.

A leader at the University of Texas said the institution would be eager to work with the Trump administration. Other universities have been more circumspect.

President Trump speaking to reporters this week. He has reveled in a threat to target what he called “Democrat Agencies” for temporary and permanent cuts.

The only hospital in Martin County, N.C., closed two years ago.

Khadiga Adam holds her severely malnourished 2-year-old daughter, Rashida, in South Sudan.

Group14 Technologies, a start-up, slowed the construction of a battery materials factory in Moses Lake, Wash., after its customers in China balked at paying higher tariffs.

President Trump’s budget proposes deep reductions for nearly ever major federal agency, reserving its steepest cuts for foreign aid, medical research, tax enforcement and a slew of anti-poverty programs.

“The consortia for H.I.V./AIDS vaccine development and immunology was reviewed by N.I.H. leadership, which does not support it moving forward,” said a senior official at the National Institutes of Health who was not authorized to speak on the matter and asked not to be identified.

Bill Gates said that Elon Musk had gutted the U.S. Agency for International Development, resulting in the deaths of children in some of the world’s poorest countries.

“I think it’s objective to say to you that things will be better in the next 20 years.”

In some cases, the Trump administration has said existing federal law already gives the president all the power he needs to act.

The Massachusetts Institute of Technology is eliminating tuition starting next fall for all undergraduate students from families earning less than $200,000 per year.