FILE – In this March 11, 2010, file photo, empty frames from which thieves took “Storm on the Sea of Galilee,” left rear, by Rembrandt and “The Concert,” right foreground, by Vermeer, remain on display at the Isabella Stewart Gardner Museum in Boston. Midnight Dec. 31, 2017, is the deadline to collect a doubled reward being offered for information leading to the recovery of 13 works worth an estimated $500 million. (AP Photo/Josh Reynolds, File)