Today on "Special Report":

A roadside bomb containing sarin nerve agent explodes near a U.S. military convoy in Baghdad. We'll have a full report.

Alisyn Camerota reports: Gay couples begin to exercise their right to marry in Massachusetts, under a narrowly decided ruling by that state's supreme court. We'll have details.

GUEST PREVIEW: For legal assessment we turn to Professor Jonathan Turley of George Washington University Law.

Brian Wilson reports: How much should taxpayers contribute toward winning the War on Terror? The Senate takes up the issue and we'll have a full report.

Carl Cameron reports: John Kerry (search) commemorates 50 years of the Supreme Court decision ending school segregation. We'll have highlights.

Jim Angle reports: President Bush celebrates 50 years since the turning point in national race relations.

Details on those stories and more on Special Report with Brit Hume at 6 p.m. ET.

— Guests and topics are subject to change