The initiative helped pressure the Chinese government to clean up the air in Beijing and was later expanded to dozens of cities around the world. Now, it’s been abruptly halted.

The program had used sensors at more than 80 U.S. embassies and consulates to track air quality, mostly in places where such data was unavailable.

Since 2008, embassies and other diplomatic posts had been publishing data about local air quality. In many countries, it was the only reliable source of such information.

President Donald Trump will stand at the front of the U.S. House chamber to address a joint session of Congress, the first of his second term in office.

Louisiana, invited the president to make the address in January to share his "America First vision for our legislative future." Since George Washington's address in 1790, presidents have long updated Congress annually on the state of play in the U.

Trump will speak before a joint session of Congress on March 4, 2025. Here’s why it isn’t officially a State of the Union address.