Mono Monday - Down to the wire

A lot of wires here...

I had to check - what does it mean, "Down to the wire"...?
There were many clarifications:
"Until the last possible second."
"To the last minute; to the very end."
"If you do something down to the wire, you continue doing it until the last possible moment."
"To the very end, as in a race or contest."
"...until the very last minute" - This may be suitable in this case: the pic is taken late in the evening and published now, the day after...