The Commission blamed ongoing community unrest for the derailing of election operations. Israelis ambushed an Egyptian troop train near Rafah, derailing it and inflicting many casualties. Accidents due to derailing of the trains were not uncommon. Derailing of trains in operation was not infrequent. In 2007, NumbersUSA was influential in derailing a bipartisan comprehensive immigration bill. Eyewitnesses said the train was travelling at high speed before derailing. In 1988, there were numerous separate incidents of Chinese freight trains derailing on the railway. A "derailer" works by derailing any vehicle passing over it. Trains, once again, were regularly derailing on the line. This was also used to experiment with derailing of trains. In addition to the SDP40Fs derailing, Amtrak was having trouble with two other six-axle designs. When derailing, the chain swings from underneath the saw towards the operator. The derailing of two trains on 17 January 2007. Nathan is aware that his plan is derailing in front of his eyes. Lydia shows this evidence to Victoria, derailing her plan.