Iraqi government officials say Abu Ayyub al-Masri, the head of Al Qaeda in Iraq, has been killed. For the latest on this story we speak with Agence France-Presse Baghdad reporter Joseph Krauss.

President Bush says he will veto a war funding bill that would call for U.S. troops to withdrawal from Iraq later this year, if benchmarks are not met. Boston University profesor Julian Zelizer provides some historical perspective on veto politics in Washington.

The study says that 10 years after first entering the workforce, a woman takes home 31 percent less than her male counterpart. We speak with the American Association of University Women's Dr. Catherine Hill, who co-authored the study.

We speak with James Green, professor of history and labor studies at UMass, Boston, about May Day's roots. We also have an audio postcard from a celebration that took place on the Charles River today.

Photographer Mark Edward Harris has made two visits to North Korea and has been to the demilitarized zone between North and South Korea. His stunning photographs from the Hermit Kingdom are featured in his new coffee table book "Inside North Korea."