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Thank you ma'am!
There are a lot of ways to get that done nowadays. The display manufacturers build 2x2 or 3x3 walls just by daisy-chaining their own model displays together, and that's cheaper. So if the wall is playing just one... thing, one input, it probably wasn't ours. Or if it's one thing accompanied by what they call "digital signage", like say Today's Events, or whatnot. There are a lot of ways to get that done nowadays.
Better chance of our gear involved if the wall is a "command and control" kind of thing, where they can display 20 different inputs at the same time, you know - three cable TV feeds, three web sites, security and traffic cameras overlaying advancing troops weather patterns and stuff.
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