Physical security describes security measures that are designed to deny unauthorized access. Physical security involves the use of multiple layers of interdependent systems that can include CCTV surveillance, security guards, protective inclusion of perimeter intrusion detection, deterrent systems, fire protection, and other systems and of which clearances is not part of it
False. If the events are planned and expected then they are not accidents. One of the definitions for accident is an event that happens unexpectedly, without deliberate plan or cause.