Whether it's for health, relaxation or a cause, running is a popular activity in the United States. Learn about some running heroes.
Climate change negatively affects agriculture, health and homes. The U.S. is investing in climate-resilience projects along with new technologies.
Secretary of State John Kerry outlined a series of principles he says could form the basis of a future peace accord between Israel and the Palestinians.
The United States is returning the historic Bells of Balangiga to the Catholic church in Eastern Samar, Philippines, from which they were taken in 1901.
President Obama condemns the July 14 attack upon a Bastille Day celebration in Nice, France, and expresses U.S. solidarity and partnership with France.
With bicycle boulevards, 'sharrows' and more than 500 kilometers of bikeways, Portland, Oregon, has become one of the greenest cities in the U.S.
A warmer world will raise sea levels and trigger extreme weather events. You can prepare for these events, and the U.S. will help other countries do that.
Scientist Piers Sellers says the Arctic is melting fast, and you can already feel it.
The United Nations wants to hear from you and the 1.8 billion young people in the world. Here are some tips on how you can get involved.