(AP) — When coal was king, its castle was the breaker — an imposing fortress that crushed, washed and sized billions of tons of Pennsylvania anthracite for use in factories, foundries and homes up and down the East Coast. Nearly 300 breakers loomed over the coal patch more than a century ago, playing a key role in the nation's rapid economic expansion and symbolizing the might of an industry that drew hordes of European immigrants who toiled, and often died, underground. The breakers gradually disappeared as anthracite production began a long, steady decline after World War I.