U.S. Says Arms Link Iranians to Iraqi Shiites  —  After weeks of internal debate, senior United States military officials on Sunday literally put on the table their first public evidence of the contentious assertion that Iran supplies Shiite extremist groups in Iraq with some of the most lethal weapons in the war.

Obama Plan Has a Critic in Australia  —  On his first trip to Iowa as a presidential candidate, Senator Barack Obama, Democrat of Illinois, found himself responding to an unexpected critic: John Howard, Australia's prime minister.  —  Mr. Howard, a conservative leader who is a close ally of the White House …

Libby Live: Walter Pincus One  —  (Sorry about the quality of this picture, which is scanned.  But I love that Pincus has a messier desk than I do.)  —  NOTES: (1) This is not a transcript — It's the blogger's approximation, and no one really knows what that is yet!

For Clinton and Obama, Different Tests on Iraq  —  Senator Hillary Rodham Clinton was challenged on Iraq from corner to corner of New Hampshire this weekend, while Senator Barack Obama drew cheers in Iowa for his opposition to the war.  —  Besides giving voters a chance to probe the views …

Dixie Chicks to country: nah-nah  —  It was more than a love of their music that was behind the Dixie Chicks' victory lap at the Grammy Awards Sunday.  —  The Texans won the three biggest awards - song, record and album of the year - for a disc in which they fought back against a country-music establishment …

Cheney Testimony in Libby Trial Would Carry High Risk  —  One figure has dominated the trial of I. Lewis Libby Jr. without even showing up in the courtroom.  Day after day, the jury has heard accounts of the actions of Vice President Dick Cheney, watched as his handwritten notes were displayed …

Target Tehran: Washington sets stage for a new confrontation  —  The United States is moving closer to war with Iran by accusing the "highest levels" of the Iranian government of supplying sophisticated roadside bombs that have killed 170 US troops and wounded 620.

Stem cells used for 'natural' boob jobs  —  WOMEN may be able to undergo a "natural" form of breast enlargement using their own stem cells and fat.  —  The technique, pioneered in Japan, results in breasts that look and feel smoother than conventional cosmetic surgery using implants.

Iraq war debate shifts to the House  —  GOP lawmakers will be in a tough position as Democrats push a resolution that dissents from Bush's strategy.  —  WASHINGTON — As the House this week launches its first major debate over the Iraq war since the November elections …

Taking on Guantánamo  —  Assigned to defend a Guantánamo detainee, jag lawyer Charles Swift joined up with legal scholar Neal Katyal and sued the president and secretary of defense over the new military-tribunal system.  With their 2006 Supreme Court victory overridden …

Entrepreneurial Culture  —  Why European economies lag behind the U.S.  —  The nations of Continental Western Europe, in the reforms they make to try to raise their economic performance, may prove to be a testing ground for the view that culture matters for a society's economic results.