Hi, I have a few questions about the Nexus and Global Entry programs for Canada/US. I couldn't find these answers on their website, so I thought I may ask you. Now, I know just recently that Nexus members now have access to Global Entry benefits (just read on their website), but for now, let's assume they're separate programs.

I'm a Canadian citizen, and if I have a Nexus card, can I fly from Hong Kong to New York, say, and upon landing in NY, use my Nexus card to pass through US customs?
- Or it this only available strictly between Canada/US (must fly to/from Canada/US)?
- Or is this only available for Global Entry cardholders?

Same thing, but landing in Canada, say, flying from HK to Vancouver. Can I use my Nexus card in Vancouver through Canadian customs?

Because, if this is true, what would be the benefit of Global Entry if I can use Nexus to enter both Canada/US (Global Entry is only for US, no)?

Thanks,