Us undersecretary of state for political affairs william burns already met with russian foreign minister sergei lavrov in early november to prepare for these new talks .
The resulting agreement shows that " retaliation works " , says luis de la calle , a former mexican undersecretary for international trade negotiations .
In july 2005 , ...... robert joseph , us undersecretary of state for arms control and international security , made a formal presentation on the purported iranian nuclear weapons program documents to the agency 's leading officials in vienna .
Firms on both sides of the border " can do business and know that the rules of the game will be respected , " says beatriz leycegui , mexico 's undersecretary of trade .