About once a month, staff members of the congressional intelligence committees drive across the Potomac River to C.I.A. headquarters in Langley, Va., and watch ... footage of drone strikes. The screenings have provided a veneer of congressional oversight. The C.I.A.s killing missions are ... unlikely to change significantly despite President Obamas announcement on Thursday that a drone strike accidentally killed two innocent hostages, an American and an Italian. Michael DAndrea ... was chief of operations during the birth of the agencys detention and interrogation program and then, as head of the C.I.A. Counterterrorism Center, became an architect of the targeted killing program. He presided over the growth of C.I.A. drone operations and hundreds of strikes. Mr. DAndrea was a forceful advocate for the drone program. He was particularly effective in winning the support of Senator Dianne Feinstein, the California Democrat who was chairwoman of the Senate Intelligence Committee until January. The confidence Ms. Feinstein and other Democrats express about the drone program ... stands in sharp contrast to the criticism among lawmakers of the now defunct C.I.A. program to capture and interrogate Qaeda suspects in secret prisons. When Ms. Feinstein was asked in a meeting with reporters in 2013 why she was so sure she was getting the truth about the drone program while she accused the C.I.A. of lying to her about torture, she seemed surprised. Thats a good question, actually.