The noise of police helicopters overhead has become a staple of life in Los Angeles. In some neighborhoods, it's a major annoyance. KCRW's Matt Holzman checked out the LAPD's aerial-surveillance center and found that replacing noisy choppers might pose a whole new set of problems. He reports that the legislature is looking at various proposed drone regulations. Meantime, if you want to find out why that helicopter is hovering over your neighborhood, you can call the LAPD Air Support Division.