College student says he was trying to expose security weaknesses ... A North Carolina college student who hid box cutters on airplanes to expose weaknesses in airline security was sentenced Thursday to two years of supervised probation and fined $500. Nathaniel Heatwole of Damascus, Md., a student at Guilford College in Greensboro, N.C., also must serve 100 hours of community service and reimburse his parents for up to $500 in legal expenses under the sentence imposed by U.S. District Judge Paul Grimm.