A missile against Buenos Aires?? The only "nuclear" plan revealed was one involving a Vulcan bomber and Cordoba (a city near the center of Argentina)
Argentine navy today:
http://es.wikipedia.org/wiki/Armada_Argentina
Argentine old destroyers (click on Bouchard, Almte. Storni, Py, Piedrabuena...)
http://www.histarmar.com.ar/Armada%2...structores.htm
ARA Gral. Belgrano
http://www.histarmar.com.ar/InfHisto...alBelgrano.htm
(histarmar is very complete, but very slow to load. I think the server is a Commodore 64)
If you want further help, let me know...