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Thousands of people in Manchester, England, defied a terror warning, and poured into the streets for a vigil honoring the victims of the Manchester Arena bombing.

A suicide bombing at an Ariana Grande concert killed 22 people and wounded 59 Monday night.

Authorities identified the bomber as 22-year-old Salman Abedi and arrested another suspect.

Hours before the vigil, British Prime Minister Theresa May announced that another attack could be "imminent."

Whales are the largest animals on the planet, but they haven't always been giants. Fossil records show that ancient whales were much smaller than the currently living behemoths.

So when did whales get so big, and how?

A new study suggests it might be due to changes in climate that affected the food that some whales eat: krill and small fish. Instead of being spread throughout the ocean, lots of krill started being packed into a small area. Bigger whales were simply more efficient at eating the dense pockets of krill, and they beat out their smaller cousins.

Leaders of the Senate Select Committee on Intelligence say they have issued subpoenas for documents from two businesses operated by former national security adviser Michael Flynn.

Committee Chairman Sen. Richard Burr, R-N.C., and Vice Chairman Sen. Mark Warner, D-Va., in remarks to reporters, said the subpoenas were sent to Flynn Intel LLC and Flynn Intel, Inc. with a specific list of documents they are seeking. The senators did not say what to what those documents relate.

A remarkably complete fossil of a young child suggests that key elements of the human spinal structure were already in place in an ancient human relative 3.3 million years ago.

The child, about three years old, likely died suddenly and quickly drifted into a body of water, where she was covered in sediment that eventually hardened to sandstone, Zeray Alemseged of the University of Chicago tells The Two-Way.

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.

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.

When the Trump administration previewed its budget last March, it called it the "hard power" budget. The latest details show that it greatly increases spending on defense, veterans and homeland security, and slashes funding for major social safety net programs such as Medicaid and SNAP (also known as food stamps).

Top officials at the U.S. Department of Agriculture didn't even try to act enthusiastic as they unveiled details of their agency's proposed 2018 budget, which includes drastic cuts in spending. "We're going to do the best we can," said Agriculture Secretary Sonny Perdue. "It's my job to implement that plan."

President Trump's proposed budget released Tuesday rests on a key assumption: The economy will grow much faster than it has in recent years — and at a more robust pace than most analysts predict.

Health officials from more than 180 countries meeting in Geneva on Tuesday have elected a new leader for the World Health Organization.

A former health minister from Ethiopia takes over an agency that's struggled recently to find the funding and exert the political leadership it needs to tackle the world's health problems.

President Trump's proposed budget, released Tuesday, calls for a major reworking of the nation's social safety net for low-income Americans. It would impose more stringent work requirements and limits on those receiving aid, including disability and food stamps, now known as the Supplemental Nutrition Assistance Program, or SNAP. It would also give states more control of, and responsibility for, such spending.

Anti-poverty advocates have vowed to fight the budget plan, which requires congressional approval to go into effect.

A new study found that 20 percent of children who were in a fatal car crashes were not buckled in properly, or were not wearing a seat belt at all, and that child fatality rates in deadly car crashes vary widely by state.

On paper President Trump's newly unveiled budget proposal is balanced. But that's predicated on an extraordinarily rosy projection for U.S. economic growth: Trump says he expects to achieve annual increases of 3 percent — a substantial boost from the 2016 annual rate of 1.6 percent.

Such pledges were a frequent theme of Trump's campaign. And they were often coupled with the observation that countries such as China and India have been enjoying fast-paced growth for years.

President Trump's fiscal plan released on Tuesday claims to balance the budget deficit while cutting funding for safety net programs like food stamps and increasing defense spending. Read more about budget' aims.

The Manchester Arena was packed on Monday night with pop fans eager to hear Ariana Grande perform. Her songs are bubblegum pop, so picture the crowd: kids and their parents, teenagers with their friends, fans looking for a cheerful night out.

At the end of the concert, an explosion struck near the arena. The blast killed at least 22 people and injured more than 50.

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