Senate Intelligence Committee Chairwoman Sen. Dianne Feinstein, D-Calif., right, welcomes CIA Director nominee John Brennan on Capitol Hill in Washington prior to the start of Brennan's confirmation hearing before the committee. Lawmakers are considering whether Congress can set up a court to decide when drones can kill U.S. citizens overseas, much like the secret courts that now grant permission for surveillance. It's another sign of the U.S. philosophical struggle over remote warfare, raised after CIA head nominee John Brennan's vigorous defense of the drones.