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The U.S. has canceled plans for an Obama-Putin summit because Russia granted temporary asylum to NSA leaker Edward Snowden. But Secretary of State John Kerry and Defense Secretary Chuck Hagel will go ahead with plans to meet their counterparts in Washington.

In Missouri, several communities have been ravaged by flooding. Among the hardest hit has been Waynesville. The town of about 5,000 people has been hit by rain storms — including some 7 inches on Tuesday, and another 6 inches Wednesday. Nearby rivers and creeks have overflowed.

On Wednesday, lawyers helping accused Fort Hood shooter Maj. Nidal Hasan asked to have their roles reduced. They told the judge they think Hasan is purposely trying to lose this trial.

The winners will share a $448.4 million jackpot — the third-largest in Powerball history. Now might be a good time to check in on any relatives you have in Minnesota and New Jersey.

Also: NSA is searching "vast amounts" of Americans' emails, New York Times reports; winning tickets for huge Powerball jackpot sold in Minnesota and New Jersey; rare Sumatran tigers born at Washington's National Zoo.

There's tantalizing — if preliminary — evidence that compounds in cocoa may boost thinking, attention and memory. But headlines on the latest research get it wrong.

Gen. Abdel-Fattah el-Sissi led the recent ouster of Egypt's democratically elected president. Seven years earlier, he was a student at the U.S. Army War College and wrote a paper called "Democracy in the Middle East." He's the latest in a series of U.S.-trained military officers to topple a civilian government.

Hungry bugs and warmer temperatures mean pine trees aren't producing as many seeds as they once did, driving up the cost of Italian pine nuts to $120 per pound in some cases. Cookbook author Julia della Croce found a colorful — and delicious — alternative in pistachios.

Carbon dioxide levels in the atmosphere cycle up and down as plants take it up in the summer and let some of it out in the winter. Over the past 50 years, these "breaths" have gotten larger, as plants in the Arctic are taking up more carbon dioxide during the warmer summers.

The Japanese government has announced that radioactive groundwater is leaking from the Fukushima nuclear power plant. To try and stop it, the Tokyo Electric Power Company, which owns the plant, has proposed building an underground wall of frozen earth around the reactors. The ice wall is supposed to keep groundwater from flowing in and radioactive water from leaking out, but nobody knows for sure whether it will work.