President Barack Obama is to release new rules on Monday designed to reduce carbon pollution from power centers.
U.S. Secretary of State John Kerry is hearing concerns about the agreement reached with Iran last month to limit its nuclear activities.
Five years ago, work crews successfully stopped a major oil spill in the Gulf of Mexico.
The United States has promised not to give up its fight against human trafficking.
The latest voter study shows American businessman Donald Trump with a big lead in the Republican Party presidential race.
The United States government said Thursday it would investigate the killing in Zimbabwe of a protected lion.
U.S. lawmakers urged top administration officials Wednesday to provide details about the group that is to enforce a nuclear deal with Iran.
U.S. President Barack Obama ended his East Africa trip Tuesday with a speech to the African Union.
The lawyers for an Israeli spy said Tuesday that U.S. officials have decided to release him in November.
Jeb Bush is the former governor of Florida.