By Jim Shepherd

Any of us who believe and defend our right to own firearms know that we face a virtual torrent of half-truths and outright misrepresentations from those who have made the removal of firearms from today's society their apparent goal in life.

The latest to repeat inexact information is Mexican President Jose Calderon. He repeated - as if fact that ninety-percent of the weapons intercepted in Mexico come from the United States. That has been totally de-bunked.

His source for this blatant misrepresentation? Our ambassador to Mexico.

When our political leaders give credence to half-truths, they're supporting lies, and liars.

Recently, Buckeye Firearms Association's Dean Rieck wrote that Diane Sawyer had rigged a mass shooting experiment on 20/20. Rieck pointed out the many fallacies with the experiment, including an attacker with a shooting skill level far above the average mass shooter who had knowledge, not only that a student would be returning fire, but WHICH student, and the presence of cumbersome and unnecessary clothing designed to slow down the response of the victim.

In a piece published at FOXNews.com, Professor John Lott has made many of the same observations about the experiment, and also examined the many facts the 20/20 report left out, noting that "sometimes even the best editors can't hide everything the camera sees."