A challenge

So the fact that we have not found the chemical weapons which we know that Saddam had is proof that they don't exist?

Here is a challenge:

Give me five years and a $10 million budget to hide one hundred 50-gallon barrels anywhere in the state of Texas. During those five years, you can observe from England or Canada.

At the end of the five years, you will have three years to find the barrels. During that time, I will have a few thousand people shooting at you as you search.

Oh, I forgot to mention that I have the option of hiding the barrels in Oklahoma or New Mexico, but you can't look for them there.

If you don't find the barrels in three years, we can conclude that they don't exist, right?