It's another Tuesday, and two more states are holding primaries, but the outcome this time could truly be crucial to the Democratic presidential nomination battle between Sens. Hillary Clinton and Barack Obama.

Piotr Wozniak has a technique to turn people into geniuses, and a portion of the technique is in a software program called SuperMemo.

NBC News projected Tuesday night that Sen. Hillary Rodham Clinton had won Pennsylvania’s presidential primary.

Visitors who viewed the Community Blogs section of the site were instead presented with Clinton's website as a result of a cross-site scripting vulnerability.

Authorities say an 18-year-old South Carolina student is behind bars after collecting the supplies needed to bomb his school.

A 4.5-magnitude earthquake shook southern Illinois early Monday, the latest in a string of quakes that have rattled the region since last week, according to the U.S. Geological Survey.

The Pentagon has cultivated “military analysts” in a campaign to generate favorable news coverage of the Bush administration’s wartime performance.

A violent and deadly weekend continues in Chicago. At least 12 people have been shot, two of them killed, since Saturday morning. Two others were stabbed in a home invasion. This comes after at least 20 people were shot, four of them killed......

A man claiming to be the leader of al Qaeda in Iraq mocked the death toll of American troops and urged his fighters to launch an offensive against U.S. forces in the next few weeks.

A Russian capsule carrying an American astronaut landed several hundred miles off-course Saturday, officials said.