Kamala Harris tells Ukrainian president that Moscow will face 'unprecedented economic costs' if it launches invasion; UK's Johnson urges Western unity against Russian threats

US Secret Service agents escort Doug Emhoff out of Washington high school, where he was attending a Black History Month commemoration

AP's White House team looks at the first 12 months of a US president who was seen as able to restore normalcy, but soon discovered that events were beyond his control

US VP Harris and her husband tracked down family of Aaron Feuerstein, who famously paid his workers even after factory burned, and were loaned candelabra

Husband of Vice President Kamala Harris pays tribute to Jewish and American values as he lights menorah with president, Jewish leaders and new Israeli envoy at pared-down party

Bidens to host COVID-curtailed Hanukkah gathering on Wednesday at the White House; Emhoff addresses lighting ceremony of National Menorah

Speculation has mounted in recent days that US president, who just turned 79 and is suffering from low popularity numbers, will not seek reelection

White House physician says president, 78, 'healthy and vigorous' after 1 hour and 25 minute colonoscopy, during which VP became 1st woman to hold presidential power in US history

'Another chapter in that history for many women, young girls across the country,' says White House after hour-long transfer of authority while Biden was under anesthesia

Proceedure, to be carried out under anesthetic, part of first routine physical exam as president; Biden, who turns 79 on Saturday, is oldest person to hold the post