As part of a Feb. 5, 2003, presentation to the United Nations, Secretary of State Colin Powell used videos and tapes of intercepted conversations to make the case that Iraq is developing forbidden weapons. CBS News Consultant Stephen Black, a former U.N. weapons inspector, said that Powell's evidence was compelling, as strong as it's likely to get in a situation where a smoking gun may be something as small as a vial of anthrax. He noted that these multimedia clips are simply those that give the clearest, simplest evidence, and that there are probably countless more tapes to back them up.

Cleanup Instructions
A Jan. 30, 2003, conversation in which an officer from Republican Guard headquarters issues orders to an officer in the field. Powell says it proves there were specific instructions from Iraqi headquarters to clean up and hide forbidden ammunition and evidence of it.

Evacuation Plans
This heated conversation took place between a colonel and a brigadier general in Iraq's elite military unit on Nov. 26, 2002, a day before U.N. weapons inspections resumed. Powell says it shows they were attempting to move - rather than turn in or destroy - forbidden materials.

Delete All References
A conversation between two commanders in Iraq's Second Republican Guard Corps that was intercepted in January 2003 discusses the urgent need to remove all references to nerve agents from written instructions.

Test Spray
Video obtained by UNSCOM several years ago shows an Iraqi F-1 Mirage jet aircraft spraying 2,000 liters of simulated anthrax during a test flight.

Warheads
UNMOVIC inspectors discover Iraqi artillery rockets, Jan. 16, 2003.