An unidentified plane flew close to the Vermont Yankee Nuclear Power Station on Sep. 13, but fighter jets sent to track the plane down never found it, Vermont Gov. Howard Dean (D) said yesterday. Dean and other lawmakers across the country are calling on the Bush administration to create no-fly zones around all 103 nuclear plants in the U.S., fearing that the plants are easy targets for terrorist attacks. The Nuclear Regulatory Commission, however, says the likelihood is remote that terrorists could take out a plant successfully.