Two-mile stretch of Huntington Beach closed after sighting at location popular with surfers and swimmersA popular southern California beach was closed after a great white shark was reportedly spotted “exhibiting aggressive behavior” on Tuesday afternoon.The Huntington Beach fire department said there was a “credible report” of a 10-12ft great white shark circling near a lifeguard tower, which is considered aggressive behavior according to the city’s marine safety division’s “shark response proto