How to transfer to NYC

I am currently an analyst at a US bulge bracket in an office located outside the states. One of the decent offices (think London, Hong Kong etc.) I was wondering how hard it will be to transfer internally to the NYC office?

My office is full of analysts/associates from the states and elsewhere who transferred internally. I just want to know how easy it is to go the other way?

Any success stories of transfers to NYC from international offices would be appreciated. Otherwise if anyone could suggest the best way to go about organizing this it would be appreciated!