text: Team Operations
  Landmarks and Symbols--A building may also serve as an important landmark or other symbol
  of national unity and resolve; in these cases, the entire building may be the critical element.
  BUNKERS
  4-132. Bunkers were formerly called hardened facilities. It can be very difficult for LRS teams to
  provide accurate BDA on bunkers unless they are able to conduct a physical inspection.
  PHYSICAL DAMAGE
  4-133. Target-element-area damage includes damage to non-load-bearing elements such as facades and
  external sheathing, as well as to broken windows and glass, blown-out curtain walls, and blown-out
  roof panels.
  No Damage--Military action has caused no apparent damage.
  Light Damage--At this level of damage, no weapon penetration has occurred, but exterior
  damage is apparent.
  Moderate Damage--At this level of damage, weapons have obviously penetrated the bunker.
  Severe Damage--At this level of damage, part, but less than one-third of, the bunker roof or
  sidewalls has collapsed.
  Destruction--At this level of damage, more than one-third of the bunker roof and sidewalls have
  collapsed.
  FUNCTIONAL DAMAGE
  4-134. Assessing damage to all types of hardened structures requires analysis of aircraft cockpit video
  (ACV) and a search for blown-off entrance doors, burn marks outside entrances, or smoke from fire or
  secondary explosions. The results of this analysis must be compared to information about the internal
  configuration of the bunker to determine the approximate location of the weapon detonation.
  4-135. A single weapon is unlikely to collapse or partially destroy a large bunker built with lots of
  thick concrete, burster slabs, and soil layers. However, a big weapon detonation inside the bunker
  generally destroys the contents. Knowledge of bunker construction such as dimensions, wall placement,
  and thickness of roofs, floors, or walls is required to accurately assess the extent of internal physical and
  functional damage.
  4-136. Functional damage to a bunker depends on its mission. If internal compartmentalization allows,
  a round that penetrates the bunker has a good chance of damaging or destroying sensitive contents such
  as aircraft or munitions. If the damage is not too great, the contents can be moved. In these situations,
  depending on the level of physical damage, the contents can be removed and the bunker can be
  reconstituted to reuse for protective storage of other equipment or supplies.
  4-137. A successful weapon penetration and detonation generally damages or destroys both mission
  and operations in a bunker serving in a production or C2 role. In any of these situations, the extent of
  functional damage depends on estimates of physical damage to the internal structure, ventilation system,
  to electronic or communications equipment, and to power supplies, lights, water lines, tools, and
  equipment, for example. Generally, long recuperation times are associated with this type of internal
  damage. As with buildings, when reporting recuperation, the team reports both the structure's
  recuperation and the recuperation of the critical elements.
  DAMS AND LOCKS
  4-138. Dams and locks have one function: to contain water on the upstream side. Military action
  can cause--