Cracks several meters long have appeared in the 2-year-old Holocaust memorial in the heart of Berlin. Fissures in 393 of the 2,711 concrete slabs that make up the Memorial to the Murdered Jews of Europe will need to be filled with synthetic resin before winter, memorial director Uwe Neumaerker said Tuesday. "The synthetic resin needs to be filled into the cracks to keep more water from penetrating the slabs," Neumaerker said. "We hope that afterward one won't be able to see those white calcium deposits anymore that have been created by the water." He said the cracks did not threaten the stability of the slabs. The site will remain open during the repair work.