Tribune editorial board

Have you ever had to look for your left foot? Ever searched for a little bucket of gravity? Have you ever caught yourself probing around with your foot to make sure the ground was still there before stepping out of bed?

If you answered "no" to those questions, we have another one for you: How do you know each of those things is there?

Your answer was likely something akin to: "I just know," or perhaps, "I can see evidence that it's there."

Let's use our imaginations a bit now.

The U.S. government has been almost single-handedly hunting for weapons of mass destruction in Iraq for more than a year.

All conventional wisdom points to the lack of existence. The fact is, and even some of the most stubborn members of the Bush administration now admit, no one has found a single weapon of mass destruction in Iraq.

But we believe WMD do, in fact, exist in Iraq.

The proof is in the evidence.

Over the weekend, 50 newly trained Iraqi military recruits were massacred facedown in a roadway. The carnage was the deadliest ambush in the 18 months of insurgency in the country.

Fifty unarmed men heading home after completing new training killed, most of them execution-style. Sounds like WMD to us.

Jordanian terrorist Abu Musab al-Zarqawi's band of evildoers claimed responsibility.

A mere few months ago, it seemed that week after week a new westerner was kidnapped, a new videotape of that hostage pleading for help, followed by news of their body being found dumped or worse yet another videotape of that person's beheading.

The constant terror created by such horrors is certainly evidence that WMD exists.

This week as the U.S. presidential election nears, some terror experts are predicting an increase in the number of terror attacks. With each one, we find more evidence that weapons of mass destruction do, in fact, exist. The evidence of their existence is all around.