Sergeant Javal Davis and Specialist Charles Graner -- begin in Baghdad on Friday. A top-level U.S. inquiry blamed the military chain of command, right up to Defence Secretary Donald Rumsfeld, for creating conditions that allowed the abuses to take place. Witnesses in Frederick's trial said the CIA sometimes directed abuse and orders were received from military command to toughen interrogations. The evidence, from an officer and a chief warrant officer who served at the jail, is among the strongest so far in the Abu Ghraib trials pointing to more senior involvement in the abuse. Previously, the Pentagon has said that the abuses were the work of a few "bad apples" acting on their own. --SP 0059 Local Time 2159 GMT