By MATTHEW DALY WASHINGTON (AP) — The number of American bald eagles has quadrupled since 2009, with more than 300,000 birds soaring over the lower 48 states, government scientists said in a report Wednesday. The U.S. Fish and Wildlife Service said bald eagles, the national symbol that once teetered on the brink of extinction, have flourished in recent years, growing to more than 71,400 nesting pairs