If you look at the top of the day photo at the moment.
Photo © Erwin
Which is a KLM Asia Boeing 747-400M - PH-BFC.
Why is this aircraft being guarded by two police cars?
Erwin says that there are two sitting near the aircraft. One can be seen by the wingtip.
This 747 was guarded by 2 police vehicles, one is visible on the ramp near the wingtip. Good example of the use of 2 airbridges like you see often here at Amsterdam.
And last thing. Nice photo Erwin