During the celebration of 125 years Kölner Verkehrsbetriebe (KVB) at
Neumarkt on 25 May 2002, thermite welding of rails was demonstrated. After the
form was removed, the glowing steel is visible.
<p>
Digital photo by
<a href="http://www-users.rwth-aachen.de/christoph.schmitz2/index.html">Christoph
Schmitz</a>