I searched this and could not find this article on Alipac. I am sorry if this is a duplicate.
This has me shocked beyond belief. I found this under Judical Watch

http://www.judicialwatch.org/totalizati ... ent-mexico


Totalization Agreement with Mexico
Wed, 10/31/2007 - 10:24 — dgrothe
Judicial Watch, under the Freedom of Information Act, obtained from the Social Security Administration (SSA) a U.S.-Mexican agreement, signed June 29, 2004, to coordinate the U.S. Social Security system with Mexico's. The cover letter from the SSA states that the agreement has not been “finalized.â€