Decorated U.S. Army veteran Daniel Davis says he's "concerned" that the United States is not backing down from its threat of military action against North Korea.
"That has virtually no chance of success," Lt. Col. Davis told CNBC's "The Rundown," as world leaders head to the United Nations in New York this week to further discuss an international response to North Korea's aggressive nuclear weapons program.
Military options, he said, should "unequivocally" be taken off the table: "That time had passed."
Part of the problem, Davis said, is that "you cannot wipe out all of their ability to fire weapons of mass destruction" fast enough to prevent a counterattack from Pyongyang.
"All you can do is to make him [North Korean leader Kim Jong Un] believe with a military strike that we are coming after him, and now he has incentive to use these weapons," he said.