San Francisco -- An appeals court Thursday dismissed a Libertarian Party activist's legal challenge to federal airport regulations requiring passengers to show identification before they can board planes. The 9th U.S. Circuit Court of Appeals rejected claims by millionaire John Gilmore, an early employee of Sun Microsystems Inc., that the policy constituted an illegal search and violated his right to travel freely. After privately reviewing the government's identification policy that was not disclosed in court for security reasons, an unanimous three-judge panel said the policy was not overly intrusive or illegal. Gilmore, the court ruled, could leave the airport if...