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The suspect arrested in Spain is thought to have perpetrated what's been described as the biggest distributed denial-of-service attack in the history of the Internet.

The White House now believes Syria has used chemical weapons. But President Obama has shown no inclination toward military involvement in another Middle Eastern war.

President Obama has said repeatedly that the use of chemical weapons by the Syrian government against its own people was a red line, and crossing it would bring U.S. action. On Thursday, the administration said that the intelligence community "does assess with vary degrees of confidence" that the regime has used such weapons "on a small scale." Yet the administration also contends that these findings fall short of the red line.

The tiny Gulf nation of Qatar has been "punching above its weight" diplomatically in the region in recent years. Now, it's taking a prominent role in Syria, arming rebels there. The U.S. wants to see such aid go to moderates. Qatar has its own approach.

President Obama on Friday defended Planned Parenthood at the group's annual meeting and attacked new laws in several states that severely restrict when a woman can have an abortion. "When you read about some of these laws ... you want to make sure you're still living in 2013."

Scientists have deployed hundreds of tiny, experimental robots to help with biopsies. They're as small as a speck of dust. They look like tiny ninja throwing stars. And researchers use magnets to retrieve them.

Democrats are using the fertilizer plant explosion in Texas and the Boston Marathon bombings to argue that the government has an important role to play in keeping Americans safe. People who want smaller government say liberals are reaching the wrong conclusions.

How hard can it be to measure the health of a population? Oregon is finding out it's difficult to decide even what to track. But the state received almost $2 billion in federal funds to improve the health of its residents and to cut costs. The state faces substantial fines if it can't prove it has done the job.

Robert Siegel talks to Boston Globe metro reporter Eric Moskowitz about the man who was carjacked by the Tsarnaev brothers last week. The carjack victim's escape was pivotal to tracking the suspects down, and may have stopped them from launching another attack in New York City.

The U.S. Navy is planning to expand training exercises off California and Hawaii, citing the need for military readiness. That's raising concerns about threatened whales and marine mammals, because sonar is known harm and, in some cases, kill them. The state of California is fighting the Navy's plan.