People around the world use more than a trillion plastic bags every year. They're made of a notoriously resilient kind of plastic called polyethylene that can take decades to break down.

But a humble worm may hold the key to biodegrading them.

It was an accidental discovery. Scientist and beekeeper Federica Bertocchini was frustrated to find that her beehives were infested with the larvae of Galleria mellonella, commonly known as a wax worm.

Mayor Bill de Blasio this week pushed ahead with plans to make New York City one of nation's few big cities to offer free, full-day preschool for all 3-year-olds­­.

The plan would serve, when fully rolled out over several years, more than 60,000 children a year. It builds on one of de Blasio's signature accomplishments of his first term – universal pre-K for 4-year-olds.

Explosions, a running gun battle, hostage-taking and an attack on a police station took place along Paraguay's border with Brazil on Monday, as a gang of bandits assaulted a private security company and reportedly made off with millions of dollars in what's being called the biggest heist in Paraguayan history.

Estimates of the amount of money taken have ranged from $8 million to $40 million, but none of those figures have been confirmed by authorities.

Let's get this out of the way: health care and border-wall funding are probably not happening this week.

There isn't even a bill written for health care, and while conservatives like the draft language that's circulating, moderates don't.

It's the same problem Republicans have had from the beginning — appeal to conservatives, lose the moderates; appeal to moderates, lose the conservatives.

It's like a water balloon — no matter which end you push on, it still pops.

President Trump pledged to "confront anti-Semitism" at a Holocaust remembrance ceremony on Tuesday. His remarks at the U.S. Capitol follow a number of controversies relating to anti-Semitism and his administration.

North Korea marked Tuesday's anniversary of the founding of its military with artillery drills, celebrations that took place as a U.S. guided missile submarine docked in South Korea and U.S. Navy ships conducted exercises with South Korea and Japan.

Meanwhile, envoys from the U.S., South Korea and Japan met in Tokyo to discuss the rising tensions with the rogue nation and "map out further punishment if the North goes ahead with more nuclear or missile tests," NPR's Anthony Kuhn reports.

Updated 3:40 p.m. ET

Senior lawmakers on the House Oversight Committee say Michael Flynn, the former national security adviser, appears to have violated the law when he took payments from groups associated with foreign governments.

Chairman Jason Chaffetz, R-Utah, and ranking member Elijah Cummings, D-Md., spoke at a news conference Tuesday, after they received a classified briefing.

"I see no data to support the notion that Gen. Flynn complied with the law," Chaffetz said.

Donald Trump won the presidency back in November, but for many liberal organizations, the battle continues. A loose network of lawyers and watchdogs has dug in to scrutinize issues involving the Trump administration's ethics and transparency.

Key topics include: the conflicts between Trump's business interests and his presidential duties; the constitutional questions raised by his foreign profits; and the performance of his appointees, many of whom now run agencies overseeing the industries they themselves came from.

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