This technique can be used where there are
stacked rooms
Description:
Two operators enter the
room and conduct a 2 man penetration technique.
When they call Clear Clear, the rest of the team will enter and move
through the two operators, to the next room.
The next in line will make
2 man penetration.
This continues trough out all the rooms.

Pros:
- It is a very fast technique
Cons:
- This technique needs a lot of operators