BA Cabin Crew and American Visas

[Bumz_Rush]

back on track

So just how do I renew my crew visa. I am based in Middle East, work freelance, and do need to visit USA as crew sometimes, and for recurrent often.
Do I need all extremities "printed", and is it try that FSI in PLB is the only place outside the USA I can do this.
Do I need to go to USA to be finger printed to be able to enter the USA. Chicken and Egg question.

Thanks, Bumz...