Arlington leaders say it could take some time for investigators to determine the cause of a large fire that destroyed a historic building in the heart of the city. Flames ripped through 2 Bits and More along North Olympic Avenue at around 7 P.M. Monday when an explosion sent debris and glass flying across the street. Investigators determined the explosion was caused by the heat and pressure that built-up inside the burning building. "It’s hard to see people losing so much," said long-time customer Wendy Scott. Scott immediately thought about the dozens of vendors who sell their goods inside the beloved store.