@VT-ASM
There was a midair collision a while back between a DHL 757 and a Russian TU154 M over Germany. The airspace was controlled by swiss skyguide. They were quick to pass on the blame on the Russian pilots, But further investigation revealed otherwise......
The skyguide controller was at fault.
Mate it wasn't controllers fault...It was sky guides managment fault.....They were to carry out maintainence but they got everything wrong. They didn't had enough controllers that night (or any night)....The controller didn't had his instruments like phone,Radar emergency warning, computer were working slow by approx. 40 seconds all due to maintainence and they didn't had any backup......