Becky Sullivan

Biden's calls with Volodymyr Zelenskyy and Russian President Vladimir Putin this weekend come as U.S. officials warn that Russia has amassed enough troops and equipment to invade Ukraine any day.

Canadian authorities announced the resumption of travel across the busy Ambassador Bridge after police removed the last group of protesters.

Since its independence from the Soviet Union, Ukraine has wavered between the influences of Moscow and the West, surviving scandal and conflict with its young democracy intact.

As much as 40% of Europe's natural gas supply comes from Russia, a reliance that puts U.S. allies like Germany in a jam when it comes to finding a sanctions solution to the crisis.

Whether NATO should expand to include countries once under Soviet influence — including Ukraine — is a question that has dogged U.S. and Russian officials for 30 years.

New satellite images show the buildup of Russian forces and equipment along Ukraine's borders with western Russia, Belarus and Crimea — including new tents, an indicator that troops may be present.

The number of U.S. troops in Europe has shrunk dramatically since the end of the Cold War — but tensions with Russia since 2014 have prompted U.S. leaders to beef up numbers and move troops eastward.

The Russian leader's remarks came as diplomatic efforts continue. British Prime Minister Boris Johnson visited Kyiv and Secretary of State Antony Blinken spoke with his Russian counterpart.

ESPN reported that Brady, considered by many the greatest quarterback to ever play, was retiring after a 22-year career. But his agent would not confirm it, prompting questions and confusion.

As experts and officials in Ukraine's capital consider a range of possible actions by Russia — including invasion, cyberattacks and disinformation campaigns — they say Ukraine lacks critical defenses.

Here is how the history of NATO, Russia and Ukraine got so complicated.

With more than 100,000 Russian troops on his borders, President Volodymyr Zelenskyy said Friday that the reaction of world leaders had created a "panic" in his country.

European leaders are working their own diplomatic avenues to end the tensions and worry that talk of a Russian invasion of Ukraine could be deepening divisions among them.

Among the demands from Russia was a guarantee that Ukraine be permanently barred from NATO membership. That would violate a U.S. "core principle," Secretary of State Antony Blinken said Wednesday.

Gruden resigned as head coach of the Las Vegas Raiders after news outlets reported on offensive emails he sent when he worked at ESPN. He has accused the NFL of leaking the emails.

Despite the Supreme Court striking down a vaccine-or-test rule for private employers, the workwear retailer is moving ahead with a mandate. The decision has fueled an outcry among some conservatives.

An undersea volcano erupted near the Pacific nation of Tonga, sending tsunami waves crashing across the shore there and around the Pacific, including a surges along the U.S. West Coast.

Hundreds, if not thousands, of workers have missed out on overtime and holiday pay in recent weeks. In Cleveland, city administrators set up a "war room" to deal with the paycheck backlog.

"In a town obsessed with appearances, Harry had a real vanity deficit. He didn't like phonies. He didn't like grandstanding. He was proud of the fact that he didn't own a tuxedo," said Obama.

Since her record-breaking run began on Nov. 17, Schneider has won 28 consecutive victories and become just the fourth person to top $1 million in regular-season earnings.