Police helicopters are an inescapable presence in Los Angeles. Near the freeways, daily accidents beckon the air patrol along with a swarm of TV news twirly-birds. In the more densely populated neighborhoods, copter blades beat the air day and night as the police respond to crimes real and imagined to probe with binoculars and spotlights. The wealthy Hills of Beverly and Hollywood are not immune to their presence: the police integrate these neighborhoods into flight patterns. Even at the beaches, LAPD and Sheriff's copters pay surprisingly close attention to sunbathers and tourists.