Good morning!

Our early posts:

-- Egyptians Take To The Streets To Mark First Anniversary Of Revolution

-- Google's New Privacy Policy Will Allow Tracking Across Services

There's little doubt that the U.S. wastes a lot of money on unnecessary health care. But pinning down the worst offenders isn't easy, as a fresh analysis of the scientific literature finds.

Published research on overuse is in pretty short supply, so rooting out waste by looking at the existing studies can be a little like limiting your late-night search for lost car keys to the spots right under streetlights.

It was a year ago today that Egyptians started a revolt that led to the fall of President Hosni Mubarak. Marking the day, tens of thousands of people took to the streets both in celebration and in protest of the military rulers that took Mubarak's place.

Reporting from Cairo, NPR's Soraya Sarhaddi Nelson sent this report to our Newscast unit:

Yesterday afternoon Google announced it was making sweeping changes to its privacy policy beginning March 1. Users can't opt out, so Google is beginning to send notice to its users via email and even on its homepage.

Staff Sgt. Frank Wuterich, who pleaded guilty of dereliction of duty in connection with the killing of 24 unarmed Iraqi civilians in Haditha, apologized during his sentencing hearing yesterday.

The AP reports:

The biggest solar storm in years has lit up the skies with the spectacular show known as the Northern Lights. The Aurora Borealis offers a spectacle of green and blue over Canada and Northern Europe. The big storm is treating stargazers as far south as England — and may well make up for the disruptions it could bring to the electrical grid and GPS signals.

In New York City, the street in front of a high school was painted with big white letters that were supposed to read "school." But the word painted read "shcool." The city says a contractor made the mistake after some street repairs.

In a daring raid reminiscent of the kind used to kill Osama bin Laden, U.S. Navy SEALs swooped into Somalia Wednesday morning and rescued two aid workers, who had been held by pirates for months.

The New York Times reports the soldiers came in by helicopter and engaged in a firefight that killed nine pirates. The SEALs left with Jessica Buchanan, a 32-year-old American, and a 60-year-old Dane, Poul Thisted, who were injury free and on their way home.

British adventurer Felicity Aston this week became the first woman to ski solo across Antarctica, from one coast to another. It took her 59 days to cover more than 1,000 miles, dragging her supplies behind her on sleds. She talked to Steve Inskeep from the Union Glacier base camp in Antarctica while waiting to go home.