Town officials in Robertson, Conn., held an open house at Robertson Airport over the weekend, hoping that a chance to get up close and personal with the aircraft based there would convince residents to support a referendum authorizing the town to buy the airport. Without the purchase, Connecticut's oldest airfield is in danger of closing. Besides meeting the need for routine and emergency transportation, Robertson Airport serves another purpose, according to some residents. "It just gives the kids a chance to be exposed to aviation," says Judy Roy, who volunteered at the open house. "The small airports are where it begins."