Thomson ReutersJanuary 25, 2013 12:45
* At least 170 flights cancelled at Duesseldorf and Cologne
* Union says no strike over weekend
* Separate pay talks break down in Hamburg (Adds Hamburg, updates flight numbers)
FRANKFURT, Jan 25 (Reuters) - Passengers travelling through Germany's Duesseldorf and Cologne airports suffered a second day of disruption on Friday as security personnel continued a strike over pay.