CHELMSFORD -- When threats arise in schools, fear collides with technology.
It happened at Chelmsford High School last Monday, when parents clogged the phone lines inquiring about a security lockdown, resulting from a report of a suspicious man in the building. By midweek, officials had determined that the man was an authorized maintenance worker.
''People know on the outside as soon as it's happening," said principal W. Allen Thomas Jr. ''Kids use text messaging from their cellphones. It's a real problem for security, because we're getting calls before we know the situation sometimes.