; (B) type of storage, such as bulk transfer; (C) typical types and numbers of security sensitive material cars stored in close proximity (in ranges); (D) population density; (E) average length of time cars are stored, attended or unattended; and (F) security measures present, including physical security measures, secure handoffs and nearest available safe havens for storage in case of heightened threat conditions. (5) Terrorism The term terrorism has the meaning given that term in section 2 of the Homeland Security Act of 2002 ( 6 U.S.C. 101 ).