Within a span of a few hours, former vice president and current 2020 Democratic presidential candidate Joe Biden both condemned President Trump's use of the word "lynching" to describe the impeachment inquiry — and apologized for doing virtually the same thing more than 20 years ago.

Updated at 2:45 p.m. ET

President Trump says he is lifting sanctions on Turkey after the country agreed to what he called a permanent cease-fire in northern Syria, ending Turkey's military offensive that began after the U.S. pulled troops from the area.

Trump argued that his decision to remove U.S. forces — criticized by U.S. Republican and Democratic lawmakers alike — helped to bring the deal to fruition.

Updated at 1:57 p.m. ET

Facing increased questions over whether Facebook can be trusted to protect its users, CEO Mark Zuckerberg told lawmakers Wednesday that the company will pull out of its controversial digital currency project if U.S. regulators don't approve it.

Zuckerberg said the social network would leave the nonprofit body governing the new currency, Libra, if other members decided to go ahead without regulatory approval.

Ambassador William Taylor delivered an explosive opening statement to congressional investigators Tuesday.

Taylor, the top U.S. diplomat in Ukraine, described a shadow foreign policy operation being led by President Trump's personal attorney Rudy Giuliani where U.S. aid to Ukraine was contingent on the country undertaking investigations that could help Trump in his campaign for reelection in 2020.

Updated at 7:10 p.m. ET

Longtime U.S. diplomat William Taylor told lawmakers on Capitol Hill on Tuesday that President Trump orchestrated a parallel foreign policy for Ukraine that made U.S. aid to the country contingent on investigations to help himself politically.

In a written statement to three House committees tasked with Democrats' impeachment inquiry, Taylor said he "became increasingly concerned" as "irregular, informal channels" of policymaking diverged from official U.S. goals — led by Trump's personal attorney Rudy Giuliani.

London says toxic air pollution has fallen by roughly a third inside a central urban zone where drivers are required to meet specific emission standards or pay a daily fine. The city launched the Ultra Low Emission Zone in April.

The city's report states that about 13,500 fewer polluting cars are driven in the zone daily, and that traffic has decreased overall in the bustling area.

Updated 3:08 p.m. ET

President Trump lashed out about the House impeachment inquiry in a tweet Tuesday morning, calling it "a lynching," a choice of words that drew sharp rebukes from lawmakers on both sides of the aisle.

In his post, Trump wrote, "So some day, if a Democrat becomes President and the Republicans win the House, even by a tiny margin, they can impeach the President, without due process or fairness or any legal rights. All Republicans must remember what they are witnessing here - a lynching. But we will WIN!"

Former President Jimmy Carter suffered a "minor pelvic fracture" after falling down in his home in Plains, Ga., Monday night, the Carter Center says. It's the second time Carter has been hurt in a fall this month; he got a black eye from a fall days after he turned 95 on Oct. 1.

Carter "has been admitted to Phoebe Sumter Medical Center for observation and treatment of a minor pelvic fracture," the Carter Center said in an announcement Tuesday. The center adds, "He is in good spirits and is looking forward to recovering at home."

Even in a pop cultural landscape dominated by costumed superheroes and masked vigilantes, HBO's new series Watchmen stands out. Watchmen was originally a comic that first came out in 1986, and it was seen as groundbreaking for its realistic and complex handling of what it might mean for someone to put on a mask and fight crime.

About three weeks ago, Vermont Sen. Bernie Sanders had a heart attack that threw his campaign into question. But now, it's more apparent than perhaps at any point in this presidential race that the 78-year-old white-haired politician and his revolution will remain a powerful force in the Democratic primary.