The Supreme Court ruled Tuesday that federal regulators have the authority to clamp down on broadcast TV networks that air isolated cases of profanity, known as "fleeting expletives." The 5-4 vote was a victory for Bush-era officials who pushed fines and sanctions when racy images and language reached the airwaves. Controversial words have been aired in scripted and unscripted instances on all the major over-the-air networks in the past six years, when the Federal Communications Commission began considering a stronger, no-tolerance policy