Marie Cusick

Regal fritillary butterflies have largely disappeared from the East Coast, save for a military base in central Pennsylvania. A few days each summer, hundreds descend for guided tours to see them.

Forty years ago, the U.S. nuclear industry suffered its worst nuclear accident. Today, the remaining reactor at Three Mile Island is slated to close because of cheaper competition from natural gas.

Homeland Security and the FBI have blamed Russia for a series of cyberattacks on U.S. power plants. The industry is stepping up efforts to protect the electric grid.

Gas and oil companies pay royalties to millions of American landowners. But a growing number accuse energy companies of cheating them out of their fair share.

A Maryland dam has been helping to clean up the Chesapeake Bay by holding back sediment that can harm aquatic life. But now the dam's sediment pools have filled up earlier than projected.

The nuclear industry is struggling with aging plants and competition from cheaper natural gas. Now, touting itself as another form of "clean" energy, it's lobbying state lawmakers for help.

The projects will need to be approved through the Federal Energy Regulatory Commission, but a resignation will leave that five-person panel with just two members — too few for a quorum.

This week marks the 150th anniversary of the battle of Gettysburg. While it's widely known as the critical turning point of the Civil War, the small Pennsylvania town has seen many other battles since then — over how the historic site should be preserved and remembered.

Residents of the South End neighborhood of Albany, N.Y., had made repeated requests for a bus route for their underserved neighborhood. Resident Willie White brought his neighbors together to demand a bus route — and a seat at the table in city politics.