Dry run (terrorism)

A dry run or a test run is an act committed by a terrorist organization or individual without carrying out any actual terrorism in an attempt to determine whether a technique they are planning to use will be successful. The dry run is part of the rehearsal for a terrorist act, and is often the immediate precursor to the attack.

The dry run is considered to be the heart of the planning stages of the terrorist attack. It is the method by which strengths and weaknesses in the plot are exposed to the terrorists, unforeseen obstacles can be detected, and the techniques are refined. Sometimes, multiple dry runs are conducted in an effort to perfect the ultimate attack.