“This is a pretty easy problem, for crying out loud.” For all the hand-wringing in Washington about a no-fly zone over Libya, that’s the verdict of Gen. Merrill McPeak, a former Air Force chief of staff. He flew more than 6,000 hours, half in fighter aircraft, and helped oversee no-fly zones in Iraq and the Adriatic, and he’s currently mystified by what he calls the “wailing and gnashing of teeth” about imposing such a zone on Libya.