The Peregrine was close to being extirpated in North America - ostensibly by the softening of egg shells by DDT - in the 1960s but has since made a steady comeback. Their preferred habitat, before the advent of modern skyscrapers, was rocky ledges on steep cliffs. Today they can also be found nesting on ledges of tall buildings and bridges in almost every city of the country.
Since adopting urban life they've taken to feeding on the abundant supply of city pigeons, and that's what this video, though filmed in a rural setting, is about:
By the way, Hinderaker's endorsement of Romney is very persuasive.