You implied that the US regularly receives containers of smuggled heroin shipped via Dubai.
I haven't heard of such a link.
BTW - is there any major world port that the CIA believes not to be a drug transshipment point?
New York? Hamburg? Vancouver? London? Marseilles? Hong Kong? Sydney?
The CIA says the UAE is one of the largest transhipment points in the world for heroin.
Can you provide a link that says the CIA is similarly concerned about any of the other ports you mention?
You're right though to challenge me to find a specific link that has the headline you ask for. Most news reports just mention where the heroin came from, and where it ended up, not where it was shipped through.
Still, if you do a search you'll find there's lots of information on the web about the role they play in the shipping of heroin.