] Despite the fact that no cache of mass destruction
] weapons has been found in Iraq, a number of crucial
] questions about Iraq's past weapon efforts - raised by
] nearly a decade of U.N. inspections - remain unanswered.

(1) VX - The inspectors never could figure out what happened to 3.9 tonnes of VX, the deadliest kind of nerve gas. Iraq admitted producing VX in 1988 and 1990, but furnished no convincing evidence that it was destroyed in 1991, as Iraq claimed.

(2) Anthrax - Iraq admitted producing 8,425 liters of anthrax

(3) Other Germ Warfare Agents - Iraq did not explain what happened to thousands of liters of other biological agent that it admitted producing, including more than 340 liters of clostridium perfringens - though inspectors concluded that Iraq had enough growth medium to have made "much larger quantities."

(4) Chemical and Biological Munitions - Inspectors could not account for 550 mustard-filled artillery shells that Iraq claimed to have lost. The inspectors determined that Iraqi mustard gas was still of a very high quality. Also unaccounted for are 29 germ-filled bombs, some possibly containing anthrax.

iraqwatch.org : Iraqi Weapons - Unanswered Questions