former top aide to Powell sorely regrets WMD speech

(CNN) - A former top aide to Colin Powell says his involvement in the former secretary of state's presentation to the United Nations on Iraq's weapons of mass destruction was the "lowest point" in his life.

"I wish I had not been involved in it," says Col. Lawrence Wilkerson, a longtime Powell advisor who served as his chief of staff from 2002 through 2005. "I look back on it, and I still say it was the lowest point in my life." More...