The Bethel Police Department is sponsoring regional training at Rockwell School today.  The regional team consists of officers from Danbury, Bethel, Ridgefield, Brookfield, and Newtown police departments. They will be practicing protocols related to school security.   The building will be closed to staff and parents.  School District administrators notified Bethel residents yesterday to say that anyone on the school campus will see police cars from other communities.  This is a planned training exercise.