Walter Cronkite - Based on the information available at the time of the invasion of Iraq, was it justified?

"It's a terrible mistake that we're in Iraq, and it's a terrible mistake to insist on staying there."

Cronkite opposed the war early on:

He became, however, an outspoken critic of what he saw as flaws in government and broadcast journalism. He disliked the current war in Iraq, telling Esquire magazine, "Indeed, we are in another Vietnam. Almost play by play. It's a terrible mistake that we're in Iraq, and it's a terrible mistake to insist on staying there."