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The development is a sign that the peace agreement reached between the U.S. and Iran last month remains on fragile ground.

An inside look at how a climate regulation became a battleground between the U.S. and Europe.

Meteorologists say National Weather Service staff shortages from President Donald Trump's workforce cuts have compromised severe weather forecasts.

The interior secretary rebuffed the idea that the president's motorcade ride over the unfinished pool may have damaged it.

The National Park Service will launch a dazzling 850,000 fireworks in the nation's capital this year. Officials acknowledge the potential health risks.

Extreme temperatures threaten to strain the grid as data centers are increasing energy demand. What could go wrong?

A third advanced reactor has reached criticality through an Energy Department program, meeting the administration's self-set July 4 goal.

The Trump administration has restarted fireworks at the memorial in a national forest in rural South Dakota.

The U.S. Energy secretary made his comments as the EU warned of life-threatening dangers from record-high temperatures.

The vessel was attacked after Iran warned ships must use its designated corridors through the Strait of Hormuz rather than the route the U.S. has backed.