Don't complain abou 1,5 hours delay
The airport opens at 6am, up to 7am there are 31 take-offs and a few landings scheduled, the next rush comes between 7:30 and 9am when the first inbound-wave is coming and leaving again.
The crash occured at 6:01, the first movement of the day.
Wiz other words, there were several planes on the ground
preparing for take-off that went up with 2-3 hours delay and causing trouble along the entire network of airlines like Air Berlin, Lufthansa, LTU
A friend of mine wanted to proceed to FRA with LH at 7:25 or so.
He stayed and got another day off - a standby took over his job on the FRA-LIS
As there are several pilots of different Airlines travelling proceeding out of DUS in the mornings on Lufthansa or DBA
I assume some companies have still trouble wiz their crew-schedules!
Regards