AER LINGUS, US IMMIGRATION AND CUSTOMS PRECLEARANCE?

I have booked a ticket, from BHX-DUB-JFK, When I check in at BHX, do my bags get checked in all the way till JFK, and I have heard there is US Immigration and Customs Preclearance in Dublin, so when I reach DUB from BHX, do I find the US Preclearance, go through and then find my gate and go there, if so, do I need... show more I have booked a ticket, from BHX-DUB-JFK, When I check in at BHX, do my bags get checked in all the way till JFK, and I have heard there is US Immigration and Customs Preclearance in Dublin, so when I reach DUB from BHX, do I find the US Preclearance, go through and then find my gate and go there, if so, do I need to do the US Preclearance in the US, or do I go to Baggage claim, how does that work..??
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