Heike Schotten is Associate Professor of Political Science at the University of Massachusetts Boston, where she teaches political theory, feminist theory, and queer theory (her work is available here). She has been active in the Palestine solidarity movement since 2006.
Trains typically run on tracks consisting of two rails, but when they are powered by electricity, they run on a third rail that supplies the train with electric power. Third rail systems are often used for mass transportation because they are so efficient. The third rail is nevertheless hazardous.