EDGARTOWN - President Obama, wife Michelle and the girls, Sasha and Malia, will land on Martha’s Vineyard this afternoon to kick off 10 days of fun in the sun, returning to the posh Chilmark farm where they vacationed last year. Air Force One is set to touch down at the Coast Guard Air Station on Cape Cod. The first family will then board a helicopter and fly over to the island. From Martha’s Vineyard Airport they’ll motorcade to Blue Heron Farm, the 30-acre hideaway on Tisbury Great Pond with a 10,000-square-foot, fully renovated farmhouse the Obamas will call home until...