GENEVA (AP) - A European laboratory that was the birthplace of the World Wide Web and home of Nobel prize-winning developments in understanding the origins of the universe celebrated its 50th birthday Tuesday. But French President Jacques Chirac warned that despite those illustrious achievements, European scientists are falling behind. Chirac and King Juan Carlos of Spain were featured speakers at the celebrations of the European Organization for Nuclear Research, known by the French initials CERN, which was created in part to help stop the brain drain from postwar Europe to the United States. "In terms of Nobel prizes, publications, patents...