German computer experts are working round the clock to unlock the truth behind an unexplained surge in financial transactions made just before two hijacked planes crashed into New York's World Trade Center Sept. 11. Were criminals responsible for the sharp rise in credit card transactions that moved through some computer systems at the WTC shortly before the planes hit the twin towers? Or was it coincidence that unusually large sums of money, perhaps more than $100 million, were rushed through the computers as the disaster unfolded? A world leader in retrieving data, German-based firm Convar is trying to answer those questions. Using a pioneering laser scanning technology to find data on damaged computer hard drives and main frames found in the rubble of the World Trade Center and other nearby collapsed buildings, Convar has recovered information from 32 computers that support assumptions of dirty doomsday dealings. The suspicion is that inside information about the attack was used to send financial transaction commands and authorizations in the belief that amid all the chaos the criminals would have, at the very least, a good head start,'' said Convar director Peter Henschel. "Not only the volume but the size of the transactions was far higher than usual for a day like that. There is a suspicion that these were possibly planned to take advantage of the chaos.''