Roasted lamb, brandy and Kennywood: Serbians celebrate 'Three Day'

It’s barely 10 o’clock on Saturday night and the floor is shaking. A band with two accordions plays at a blistering clip while dozens stomp their heels and move their feet at a frenetic 160 beats per minute. They let out whooping calls like banshee screams, when they’re not catching their breath and wiping sweat from their brows.