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Nearly a century ago, Einstein predicted the existence of ripples in the fabric of space-time. He also predicted that they would be too small to detect. But physicists armed with precision lasers -- and patience -- are confident they'll catch one. NPR's David Kestenbaum reports for All Things Considered.

The Senate resumes debate on President Bush's $87 billion funding request for operations in Iraq and Afghanistan. Some Republicans join Democrats calling for Iraq to repay some of the reconstruction costs. NPR's David Welna reports.

An illegal immigrant who served in the Army in Iraq is now being investigated for lying about his immigration status. Pvt. Juan Escalante faces the possibility of a dishonorable discharge, deportation, or mild disciplinary action. Tom Banse reports.

Brazil and the United States both claim roles in the origins of modern aviation. The United States says it was the Wright brothers who first flew an airplane. NPR's Martin Kaste reports on Brazil's version of the facts.

Hans Blix, the former director of the U.N. Inspection Commission, addresses the UN Thursday with a report on Weapons of Mass Destruction, Tackling the WMD Challenge. Blix is now chairman of the independent Commission on Weapons of Mass Destruction.

British Prime Minister Tony Blair briefs reporters on the bombings on London's transit system Thursday. Blair said the incidents were intended to frighten people rather than cause real harm.

Former President Clinton is resting comfortably after successful coronary bypass surgery this morning, say officials at New York Presbyterian Hospital. Clinton was admitted to the hospital several days ago after complaining of chest pains. NPR's Brenda Wilson reports.

Brzezinski has reported on the nation's homeland security since Sept. 11, for magazines including Mother Jones and The New York Times Magazine. His new book is Fortress America: An Inside Look at the Coming Surveillance State (out later this fall).

Greece's long history -- and mythology -- were on display at the Olympic opening ceremonies in Athens Friday. Athletes from a record 202 countries are taking part in the games. NPR's Sylvia Poggioli reports.

Palestinian leader Yasser Arafat faces down a revolt by disaffected members of his own political organization in the Gaza Strip. The dissidents are demanding reforms to share power. NPR's Peter Kenyon reports.