Commandant Gen. Jim Amos made headlines last week when he challenged me in a letter to the editor published in Marine Corps Times to attend the service’s difficult Infantry Officer Course as a participant. The invitation was issued after he took umbrage with a recent story I wrote that had a headline saying two female volunteers for the course “flunked” IOC last month as part of ongoing research into which roles service members can fill in combat. I met with the commandant Monday morning at the Pentagon to discuss the issue. By mutual agreement, we decided that it would be…