More than one group was involved in smuggling heroin out of Lebanon and into the USA using PanAm flights.
Reportedly, these groups included:
A. The group working for Syrian Monzer al Kassar, a CIA asset with reported links to Oliver North and Mohammed Atta. (Monzer al-Kassar - Wikipedia / Madcow Morning News.)
B. Members of the PFLP-GC (Popular Front for the Liberation of Palestine General Command) which had links to Monzer al Kassar, the CIA asset.
The PFLP-GC bomb-maker Marwan Khreesat was a Jordanian intelligence service (GID) agent with links to the CIA. (Pan Am Flight 103.)
C. The CIA unit known as Corea, which worked with Monzer al Kassar. (Franklin, Dutroux, Mossad, McKee)