"biggest" by number of affected CPUs? very possibly, yes. the march of time has that effect: there are more cpus potentially and actually affected, worldwide, than at any other time in history.
"biggest" by net financial loss to a single entity? I dunno. How much did that failed NSA launch cost the state again?
It's unclear whether it failed or if Northrop Grumman want us to think it failed; since the second stage actually did one full orbit with nominal performance, they might be trying to slip one past us. We'll know in a few weeks time I suppose, every satellite tracking enthusiast will be looking for it.
To which no government agency is officially attached and the failed thing is more a rumor. SpaceX said that on Falcon 9 side everything worked like it should and NG says they cannot comment on classified payloads. So there's literally no information.
"biggest" by net financial loss to a single entity? I dunno. How much did that failed NSA launch cost the state again?