 The Technical Department contributed to this effort as well, namely by creating improvised explosive devices and incendiary bombs, both of which, according to Solzhenitsyn, saw use during the actual invasion in June, the latter bringing down a guard tower.In addition to the above-mentioned innovations, the Technical Department dealt with any number of problems that arose.When the exiled camp authorities cut off the camp's electrical supply, the electricians among the prisoners siphoned electricity from the wires passing overhead just outside the perimeter fence.