Update at 5:35 pm ET. Brennan on drones:
As senators questioned John Brennan, the nominee to head the CIA, one of the recurring themes was the broader impact of the lethal drone strikes.
Susan Collins, a Republican from Maine, asked whether the Obama administration was killing terrorists who might otherwise be captured and interrogated.
Brennan insisted that it was always preferable to capture and question terrorists to gather intelligence, and he said lethal strikes were taken as a last resort.
