Can I add a reason? International politics: Mexico isn't a nuclear power. It could be if it wanted to, but they renounced nukes following the Treaty of Tlatelolco in 1968. Maybe for once we won't be living in another country's bullseye. See: http://en.wikipedia.org/wiki/Mexico_and_weapons_of_mass_destruction
You most certainly can add a reason...and you are exactly right.