"U.S. counterterrorism policy has caused some intense backlash and has had a lot of unintended consequences," said Rosa Brooks, a former Obama administration Pentagon official.
Obama's counterterrorism policy facing mounting criticism →
"Now we have the executive branch making a claim that it has the right to kill anyone, anywhere on Earth at any time, for secret reasons based on secret evidence in a secret process undertaken by unidentified officials," she added.
White House ducks drone hearings, draws senators' scorn →
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