There is a very real possibility of compromising that intelligence source. If that source is compromised, it because useless (in the event the source is technology), or terminated (in the event it is HUMINT).
Thats what I get for trying to post something when I'm in a hurry. That sentence should really read:
There is a very real possibility of compromising that intelligence source. If that source is compromised, it becomes useless (in the event the source is technology (SIGINT)), or terminated (in the event it is a person/people (HUMINT)).