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The privately built border wall in Texas teeters on the banks of the Rio Grande with serious erosion problems. The contractor was awarded more than $2 billion in official wall contracts.

News of the agreement to seek a peace treaty ending the Korean War and achieve nuclear disarmament has inspired some to dream of a nation reunited. Others warn that big problems are likely to remain.

Wild horses out west are sometimes rounded up kept in captivity. William Simpson wants change that. He says the horses should be freed onto public lands where they can help mitigate forest fires.

The bipartisan infrastructure law granted federal firefighters a big pay bump. Amid a looming government shutdown, that wage increase will expire, leaving first responders unsure about their income.

For the second straight day, residents of Toledo, Ohio, are without tap water. The problem is caused by the discovery of a toxin in the water supply, likely the result of an algal bloom.

The wetlands damaged in southern California's oil spill had been restored decades ago, and are some of the last remaining in the area. Ecologists say damage from the recent spill will be long lasting.

It used to be Seahorse Key was the largest bird colony on Florida's Gulf Coast, home to up to 20,000 nests. Now silence has replaced the din of noisy nesting birds and researchers are puzzled.

When cows overgraze it's bad for the soil and the climate. The U.S. Bureau of Land Management is experimenting with virtual fencing to help avoid overgrazing.

Fire swept through the canyons where the rare trees had outlived the dinosaurs. For days, the smoke was so thick that no one knew whether the careful plan to protect them had worked.

There's a man-made island near Charleston that's now serving as a sanctuary for thousands of shorebirds. It's one beneficial way to use soil from dredging rivers.