Originally Posted by
Global_Hi_Flyer
"I'm sorry sir, the bar code can't be read so it's invalid. You must go back to the counter to get a valid boarding pass".
More like "We're sorry, the bar-code scanning computers are down, so we had to close the checkpoints. All flights are canceled."
Once the system is running it will be unimaginable to operate without it. Think of the security risk.
That's what CPB does. When the network is down, they're down, and you can't get into the country.