LONDON (AP).- A landmark pier in southeastern England that once hosted a Rolling Stones concert was virtually destroyed in a fire Tuesday, probably marking an end to local hopes of preserving the 19th-century structure. Two teenagers were arrested on suspicion of arson, police said. The dilapidated Hastings Pier, which juts into the English Channel and is a relic of gentler times when mass tourism meant a trip to the seashore, had been closed since 2006. About five dozen firefighters were at the scene at the peak of the blaze, authorities said. “About 95 percent of the structure has been destroyed,” regional fire department spokesman Simon Rose said. There was some hope, however, that the cast iron pilings had survived and might support rebuilding. In its heyday, tourists