Which intelligence collection discipline do you think is most effective in counter-narcotics operations?

The week five discussion addresses the role of intelligence in U.S. counter-narcotics efforts. It will help you examine the usefulness of the various intelligence disciplines. Respond to the following question:Which intelligence collection discipline do you think is most effective in counter-narcotics operations? I am biased because I am a SIGINT analyst that worked the counternarcotics mission in Key West at JIATF-S.