Harold Hamm, an Oklahoma oil tycoon, has played a central role in reshaping energy policy by allying himself with President Trump.

© Loren Elliott for The New York Times

María Corina Machado, who spent over a year in hiding in Venezuela, greeted supporters in Oslo, hours after her daughter accepted the Nobel Peace Prize in her name.

© Jonas Been Henriksen/NTB Scanpix, via Associated Press

If the Trump administration allows Nicolás Maduro to endure, it will signal that a criminal dictatorship masquerading as a state can stare down the United States and win.

New research shows that climate change is beginning to erode home prices in the most disaster-prone areas of the United States. Here’s what to know.