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FBI agents witnessed J. Everett Dutschke trying to get rid of items authorities say would implicate him with the mailing of ricin-laced letters to President Obama and other officials.

As we've reported, the FBI originally arrested Paul Kevin Curtis in the case, but Curtis told them he was being set up by Dutschke, his rival.

Update at 1 p.m. ET, May 1: Victims Identified:

President Obama affirmed Tuesday that there's evidence Syrians have been attacked with chemical weapons — in particular, nerve gas.

But that's not the same as proof positive.

"We don't know how they were used, when they were used, who used them," Obama said. "We don't have a chain of custody that establishes what exactly happened."

Congress decided last week to ease the effects of the across-the-board federal spending cuts on travelers upset over airport delays. But low-income Americans who rely on government housing aid are still feeling the pain.

Housing authorities across the country have all but stopped issuing rent vouchers as they try to deal with the cuts known as sequestration. Many newly issued vouchers have been rescinded, leaving some people homeless or doubled up with family and friends.

And the cuts come at a time when there's a severe shortage of affordable housing across the country.