Colin Dwyer

One day after a bombing claimed at least 22 lives at a concert venue in Manchester, England, Prime Minister Theresa May has announced that the U.K. is raising its terror threat level. The move, declared Tuesday evening, means members of the British military will be deployed throughout the country to supplement its police forces.

Gunfire erupted between Philippine security forces and militants in Marawi City in the mid-afternoon Tuesday. By the time the sun had set on the small southern city, President Rodrigo Duterte had declared martial law in the region and vowed to end his diplomatic trip to Moscow early.

In the first of three matches with the world's No. 1 Go player, a Google artificial intelligence program claimed victory Tuesday. It won the round by just a fraction of a point in Wuzhen, China, but the win was enough to leave its grandmaster opponent impressed and thoroughly confounded by the result.

In November 1969, Richard Oakes and dozens of his fellow Native American activists came ashore at Alcatraz. The little island in San Francisco Bay had lain dormant since 1963, when its infamous federal prison had been shut down, and the group Oakes led set out to claim the land as its own.

It's pretty safe to say President Trump did a few attention-grabbing things this weekend on the first leg of his first foreign tour in office. He delivered an address to the leaders of Muslim-majority countries, for instance, and took part in a sword dance with Saudi leaders in Riyadh.

Jean-Michel Basquiat joined "joined the pantheon of great, great artists" Thursday night, when the late painter's 1982 work Untitled sold for a record-breaking $110.5 million at auction — the highest sum ever paid at auction for a U.S.-produced artwork.

That breathless assessment was offered after the sale by Oliver Barker, chairman of Sotheby's Europe. So you can imagine just how thrilled the buyer must have been.

Updated at 12:30 p.m. ET

Swedish prosecutors have announced they are dropping the country's rape investigation of Julian Assange. The WikiLeaks founder, who has long denied the allegation, has been holed up at the Ecuadorean Embassy in London since 2012 to avoid Sweden's extradition request.

Updated at 12:45 a.m. ET

At least one person was killed Thursday when a vehicle hit a crowd of pedestrians in Times Square, according to fire officials in New York City. Twenty-two other people were injured in the incident.

As Iranian voters prepare to head to the polls Friday, there's one thing the high-stakes presidential election certainly will not decide: the country's commander in chief.

That post, at least, is already filled by Ayatollah Ali Khamenei, Iran's supreme leader for nearly three decades. As long as he maintains control over the highest seat in the land, Khamenei enjoys wide-ranging authority over the security forces and effective veto power over matters both diplomatic and domestic — including the council that vets and approves presidential candidates.

Updated at 2:30 p.m. ET

For years, Puerto Rico has grappled with an ever-mounting debt crisis, watching as its public-sector bills have grown to more than $70 billion. Including what the U.S. territory owes to pension funds, that debt exceeds $120 billion.

Now, Puerto Rico's struggle with its creditors has stepped into U.S. federal court, where an unprecedented debt-restructuring case opened with a hearing Wednesday.

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