Disturbing news from Afghanistan: The US Army says it has opened a crimi nal probe into the role of a group of American soldiers in the deaths of three Afghan civilians. Equally disturbing: Those American soldiers can no longer assume that they'll be treated fairly. Details from the probe are few (as they probably should be) -- but Pentagon brasshats are certainly operating from a place of limited credibility when it comes to prosecuting GIs. Witness their willingness to railroad three Navy SEALs (since exonerated) on trumped-up charges that they gave an Iraqi terrorist in their custody a fat lip....