KYIV, Ukraine (AP) — Ukraine's leaders sought to reassure the nation that a feared invasion from neighboring Russia was not imminent, even as they acknowledged the threat is real and prepared to accept a shipment of American military equipment Tuesday to shore up their defenses. Russia has...

Pfizer has begun a study comparing its original COVID-19 vaccine with doses specially tweaked to match the hugely contagious omicron variant. Pfizer and its partner BioNTech announced the study on Tuesday. COVID-19 vaccine makers have been updating their shots to better match omicron in...

ISTANBUL (AP) — Rescue crews in Istanbul and Athens scrambled on Tuesday to clear roads that came to a standstill after a massive cold front and snowstorms hit much of Turkey and Greece, leaving countless people and vehicles in both cities stranded overnight in freezing conditions....

Celebrations this twelvemonth marking Queen Elizabeth's seven-decade reign volition disguise a little blessed world for the world's pre-eminent royal family: the British monarchy is being questioned successful ways that were unthinkable for astir of the past 70 years. From the U.S....