Would you happen to know what year KE's inaugural flight to PRG took place?
It started just this year, May 15 to be exact. First Korean Air intended to have PRG
only a summer destination, served by A330. The demand was unexpectedly high so they turned it into all-year round one, 744 served this route 15.7.-21.8., A330 for the rest of the year.
The reason why they gave a water canon salute to the 747 was, that KE935/936 was historically first scheduled 747 service to PRG
have seen numerous 747 flights before, but these were either unscheduled replacements or charters.