Marches took place across the United States and around the world.
Donald Trump took the oath of office Friday.
Airbus says it plans to test a prototype of a self-flying vehicle to transport people in the sky above busy city streets.
Many people believe a college education can help any hard working person.
Donald Trump faces a deeply divided country.
Donald Trump takes the oath of office to become the 45th president of the United States on the U.S. Capitol steps on Friday.
The first U.S. president, George Washington, was inaugurated in New York City.
Students are learning yoga exercises and meditation skills.
The very first born and oldest surviving gorilla in captivity has died.
More than 40 representatives have said they will not attend the inauguration.