The low flyby marks the end of the INIOHOS 2017 exercise
Five jets flew over Athens at around 12:30′ local time. The jets were taking part in the Greek exercise INIOHOS 2017 which end today and they were one Greek F-16 Block 50, one Israeli F-16 Block 30, one Italian AMX and one Greek F-4E.
They made two low flybys over the Acropolis and then they flew over the Euripus Strait and the Rio-Antirio bridge before returning to their base.
The United Arab Emirates pilots didn’t participate in this flight, probably because they didn’t want have a photo of them flying next to the Israelis.
Last year the USAF F-15s had made a similar low flyby. Link