english: I think it's one thing to say there's 140,000 planes being monitored by the federal government at any one time, and it's another thing to see that system as it ebbs and flows.
non_english: Het is één ding om te zeggen dat 140.000 vliegtuigen op elk gegeven moment worden gemonitord door de federale overheid, en heel wat anders om dat systeem in beweging te zien.