During the celebration of 125 years Kölner Verkehrsbetriebe (KVB) at
Neumarkt on 25 May 2002, thermite welding of rails was demonstrated. The
reaction in the pot was just started.
<p>
Digital photo by
<a href="http://www-users.rwth-aachen.de/christoph.schmitz2/index.html">Christoph
Schmitz</a>