The United States is paying tribute to Dr. Martin Luther King Jr's legacy the same day a new president was inaugurated.

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Martin Luther King III, a civil rights activist and the son of Martin Luther King Jr. and Coretta Scott King, spoke to CBS News on MLK Day and Trump's inauguration.

President-elect Trump on Monday becomes only the third president to take the oath of office on Martin Luther King Jr. Day. The collision of the two events has set members of the civil rights

MLK Day will be observed on Monday, Jan. 20 this year. U.S. Postal Service post offices will be closed on Monday, Jan. 20, and mail will not be delivered on the day, the USPS told USA TODAY. The USPS will resume regular operations on Tuesday, Jan. 21.

Martin Luther King Jr. Day and Inauguration Day both fall on Jan. 20. Here's what's open and closed on the federal holiday.

Texas officially recognized MLK Day in 1991. Today, it remains the only federal holiday designated as a national day of service.

Martin Luther King Jr. Day honors service, not self-gratification. For those who may simply see the day as government-granted time off for a long we

It was first proposed four days after King's 1968 assassination outside a Memphis motel. It took 15 years until it became a federal holiday.

In Harlem, New York, while signing copies of his first book, “Stride Toward Freedom,” Izola Ware Curry stabbed King with a letter opener between his heart and lung. He was taken to Harlem Hospital where his physician, Dr. Aubré D. Maynard, said, “If you had sneezed, your aorta would have been punctured and you would have drowned in your own blood.”

MLK Jr. Day is a federal holiday, so most government offices across the nation are closed and the Postal Service won't be delivering mail.