The Federal Communications Commission is appealing a bankruptcy judge's decision to protect the license held by troubled FiberTower Corp., Dow Jones DBR Small Cap reported today. Federal authorities were threatening to take away that license and accused Bankruptcy Judge Michael Lynn of interfering with federal law when he told the agency not to terminate the license before FiberTower's license-renewal request goes through the lengthy federal review process. The agency's appeal, filed on Thursday, asks a district court judge to reexamine the decision.