NASA to Realign Constellation Program Milestones, August 2008
"In a news conference Monday, NASA managers discussed how the agency will be adjusting the budget, schedule and technical performance milestones for its Constellation Program to ensure the first crewed flight of the Ares I rocket and Orion crew capsule in March 2015."
NASA's Exploration Systems Architecture Study -- Final Report, Nov. 2005, Executive Summary, section 1.1.1
"Dr. Michael Griffin was named the new NASA Administrator in April 2005. With concurrence from Congress, he immediately set out to restructure NASA's Exploration Program by making its priority to accelerate the development of the CEV to reduce or eliminate the planned gap in U.S. human access to space. He established a goal for the CEV to begin operation in 2011 and to be capable of ferrying crew and cargo to and from the ISS."