<iframe src="http://www.npr.org/player/embed/1510770/1510771" width="100%" height="290" frameborder="0" scrolling="no">
London's mayor launches a campaign against the pigeons of Trafalgar Square, which he calls "rats with wings." Those who aid the enemy with food face a hefty fine.
NPR thanks our sponsors
Become an NPR sponsor
Support The Programs You Love