retired army colonel peter mansoor led a u.s.brigade in iraq in 2003 to 2004, then returned as executive officer to commanding general davidro petraeus during the 2007-2008 u.s. troop surge. he's the author of "baghdad atat sunrise," and now teaches military history at ohio state university.an john mearsheimer, a west pointce graduate and former air force officer, is a professor and co- director of the program ono. international security policy at the university of chicago.ns welcome, gentlemen, colonel mansoor, begin wuing, what are the lessons that we get or whatov do we learn from this trov of documents about the iraq war that we didn't know or fully appreciate before? d >> i don't think the documents provide any newoo information if you have paid attention to the good reporting out of iraq. most of what's been revealed has been reported before but what the documents provideet is a lot of the detailed granularity that was perhaps absent in sort of the general reporting from the theatre. >> warner: and prove ser mere shimenter