Army core of engineers logo is a red castle.
They have a location at Greencastle Illinois.
5:5 has been clarified by Q to mean we hear you.
President Trump even engages with this 5:5 coded communication.
It seems possible that the army core of engineers from greencastle might be put to work because they hear us asking for it.
If this is an accurate interpretation- it’s most likely the wall.
[y] could mean yes
Another thought is in reference to Pres trumps budget message. On stage At 5 minutes 5 seconds (5:5) Pres Trump starts to talk about the border and building the wall.