Hanging the banderoles around the city was done as a last minute effort (two days prior to the event) by the Sirius special team (Fateh, Bakir, Oussamah, Kamal, Hisham...), due to the lack of cooperation and delaying tactics by the State Communal Assembly (APC)...

Didn't we keep saying that Astronomy is a multiple skills activity?

Kamal our veteran in full action

Roaming through the cities streets at night,
without a single written authorization...

Here's the Sirius team at the end of a lengthy non astronomical night.