NEW YORK — Frantic family members are pleading for help in the search for a South Carolina husband and wife who seem to have vanished on their way to New York City last week. Wayne and Dianne Guay, of Myrtle Beach, S.C., were expected in the Ridgewood section of Queens on Thursday night for an early holiday visit, said Daniel Rodriguez, their son-in-law. They were expected to make a 4 a.m. start that morning and drive straight north to their former neighborhood. The family rented a helicopter to do its own 50-mile sweep around Myrtle Beach, said Rodriguez, called 100...