John E. McLaughlin, then the C.I.A.’s deputy director, who the 9/11 commission reported had raised concerns about the C.I.A.’s being in charge of the Predator, said: “You can’t underestimate the cultural change that comes with gaining lethal authority.
“When people say to me, ‘It’s not a big deal,’ ” he said, “I say to them, ‘Have you ever killed anyone?’
“It is a big deal. You start thinking about things differently,” he added. But after the Sept. 11 attacks, these concerns about the use of the C.I.A. to kill were quickly swept side.