ORLANDO, Fla. — The FBI raided the Orlando Museum of Art on Friday and seized more than two dozen paintings attributed to acclaimed artist Jean-Michel Basquiat, nearly a year into its investigation of their authenticity. Outside the museum at Loch Haven Park north of downtown, a team of FBI agents could be seen carrying boxes into the building. Visitors arrived to find closed signs on the door. A security officer said he didn’t know why the museum was closed or when it would reopen. But the circling TV news helicopters overhead and the men loading boxed-up artwork showed it was not business as…