In 35 years of service as a soldier, Colin Powell earned a reputation as the quintessential disciplined warrior. As secretary of state in President Bush's first term, Powell was widely seen as a disciplined, moderate -- and loyal -- voice for the administration. Now out of government service, Powell is airing openly his disappointments and frustration on everything from the invasion of Iraq to the federal response to Hurricane Katrina.
Powell, 68, who recently visited storm survivors at Reunion Arena in Dallas, said he was "deeply moved" by the families displaced by the devastating storm and was critical of the preparations for Hurricane Katrina. "I think there have been a lot of failures at a lot of levels -- local, state and federal. There was more than enough warning over time about the dangers to New Orleans. Not enough was done. I don't think advantage was taken of the time that was available to us, and I just don't know why," Powell told ABC News' Barbara Walters in an exclusive interview airing Friday night at 10 p.m. on "20/20."