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Mikko Hypponen is a "white hat" hacker in Finland who breaks into security systems to test network safety. Hypponen tells NPR's Guy Raz of the TED Radio Hour that Americans may be protected under NSA reforms, but foreigners like himself aren't.

In politics, it often comes down to timing. And right now, the timing just isn't good for congressional Republicans to take up an immigration overhaul.

Alice McKennis has a metal plate and 11 screws in her leg after breaking it in 30 places in March. She's had other injuries before that, but she says it gives her an edge over the competition. "To make the Olympics is extremely hard," she says, "so it takes a certain kind of toughness."

This super cold air is usually whirling around the Arctic. But a big piece has plunged further south than normal. One way to think about what's happening: If a spinning ice skater extends her arms, she slows down. Sometimes, she wobbles and falls. The polar vortex has sort of stretched out an arm.

Charlie Trotter was one of the country's most influential chefs. His death comes just a year after he closed his namesake restaurant in Chicago. Authorities plan to conduct an autopsy on Wednesday.

For a long time, archaeologists weren't sure what to make of the cookware excavated at ancient Mycenaean ruins in Greece. That is, until one researcher built replicas of the vessels to try to cook just like the Mycenaeans did.

The blaze at a complex that housed the elderly quickly engulfed much of the building. Investigators were having a hard time searching for victims because water used to fight the flames had frozen over the scene. A key question: Why was the complex only partially fitted with sprinklers?

Ousted Egyptian President Mohammed Morsi was in a Cairo courtroom on Tuesday, seen and heard for only the second time since he was thrust from office in a military coup last July. Morsi and other members of the Muslim Brotherhood are facing charges of collusion with Hamas and Hezbollah during the 2011 uprising against the Mubarak regime.

Although it may be uncomfortable for patients to learn that there are profound disagreements among doctors about medicine, these differences of opinion are common.

Opportunity, NASA's Mars Rover, landed on Mars on Jan. 24, 2004. It was supposed to be a three-month mission, but 10 years later the rover is still investigating the red planet and sending data and images back to NASA. Jim Bell, an astronomer at Arizona State University, talks with NPR's Rachel Martin about Opportunity's decade on Mars.