Zohran Mamdani was sworn in as mayor of New York in a private ceremony at an abandoned subway station before the public inauguration event outside City Hall; 34, a democratic socialist, he is the first Muslim and South Asian to govern US’s largest city

The atomic clocks at the National Institute of Standards and Technology, some of the most accurate in the world, fell out of sync of 5-millionths of a second earlier this month because of a power outage

National Guard troops will not be deployed in Illinois following a Supreme Court decision that left in place a ruling by a federal judge in Chicago: the justices turned down government’s request in what is its second loss before a court in four days

The construction of President Trump’s ballroom at the White House, for which a pavilion has been tore down, is once again under scrutiny as the National Trust for Historic Preservation filed a lawsuit aimed at stopping the project

The House of Representatives voted to pass a bill directing the Justice Department to release all files related to its investigation into the Epstein case with the exception of one vote; Senate agreed via unanimous consent, without a formal vote