While some of these problems were due to mechanical failures, and responsibility for some of the others is still being debated, Kraft did not hesitate to assign blame to Carpenter, and continued to speak out about the mission for decades afterwards. His autobiography, written in 2001, reopened the issue; the chapter that dealt with the flight of Mercury-Atlas 7 was titled "The Man Malfunctioned." In a letter to The New York Times, Carpenter called the book "vindictive and skewed," and offered a different assessment of the reasons for Kraft's frustration: "in space things happen so fast that only the pilot knows what to do, and even ground control can't help.