By SCOTT SHANE and THOM SHANKER

WASHINGTON — The C.I.A. drone strike that killed Anwar al-Awlaki, the American-born propagandist for Al Qaeda’s rising franchise in Yemen, was one more demonstration of what American officials describe as a cheap, safe and precise tool to eliminate enemies. It was also a sign that the decade-old American campaign against terrorism has reached a turning point.                                                                                                                                                                                                                                                                                                      Disillusioned  by huge costs and uncertain outcomes in Iraq and Afghanistan, the Obama administration has decisively embraced the drone, along with small-scale lightning raids like the one that killed Osama bin Laden in May, as the future of the fight against terrorist networks.
           “The lessons of the big wars are obvious,” said Micah Zenko, a fellow at the Council on Foreign Relations, who has studied the trade-offs. “The cost in blood and treasure is immense, and the outcome is unforeseeable. Public support at home is declining toward rock bottom. And the people you’ve come to liberate come to resent your presence.”... Continue reading.