President Bush led the country Tuesday in paying tribute to the seven heroes who died aboard the space shuttle Columbia.

We'll get reaction to the ceremony from Phil Lening, a close friend of Commander Rich Husband, and Eric McNair, who lost his brother Ron on the space shuttle Challenger.

Investigators looking into the space shuttle disaster will have a well-documented record of years past reflecting mounting safety concerns, tight budgets and shortages of key experts in the NASA program. But could the agency garner more support than ever before as a result of the Columbia tragedy? Molly de Ramel will examine the powerful people who support the space program.

Smoking gun? Secretary of State Colin Powell goes before the United Nations Security Council on Wednesday. Will he be able to convince the world of the need to disarm Iraq? We'll get a preview from former Clinton Chief of Staff John Podesta.

Safe at home? Is the homeland prepared for a chemical or biological attack? Health and Human Services Secretary Tommy Thompson explains what you can do to get ready for the unthinkable.

We'll get a read on the markets from Charles Payne, CEO and principal analyst at Wall Street Strategies; Jeff Birnbaum, Washington bureau chief of Fortune magazine and a FOX News contributor and Gregg Hymowitz, founder of Entrust Capital.

If you are feeling uneasy these days, you are not alone. From the Columbia disaster to a looming war, from stock market losses to job worries, Steve Berglas, author of Reclaiming the Fire, explains how the constant uncertainty is just as unsettling for Wall Street as it is for Main Street.

We'll have those stories and more, today on Your World w/Cavuto!

About Your World...

More than just facts and figures, Your World with Neil Cavuto gets to the heart of the matter with reports from FOX News correspondent Molly de Ramel and in-depth analysis from our FOX Business News All-Stars:

Terry Keenan, host of Cashin' In
Brenda Buttner, host of Bulls & Bears
David Asman, host of Forbes on Fox