When the Convention for the Protection and Promotion of the Diversity of Cultural Expressions came into force in 2007, for this first time in modern history, the right of states to adopt policies to protect and promote their cultural expressions was affirmed in an international legal instrument.

UNESCO: UK National Commission for UNESCO :: Convention on the Protection and Promotion of the Diversity of Cultural Expressions (2005)

But these public expressions have not, by the time of this writing, at the end of 2006, yielded a sufficient international response.

NPR: Sudan Sanctions: Too Little, Too Late?

In particular, the performance of some cultural expressions in a different space or time than that which corresponds to the tradition can lose all its significance for the local communities concerned.

UNESCO: Outline of Digital Archiving Project

In fact, even the angry expressions alone were variable enough to classify her volunteers into families 75% of the time.

ECONOMIST: Facial characteristics

Ekman himself offers training from his website, or you can train yourself by studying facial expressions and identifying the basic ones using simple pictures which you look at for shorter and shorter periods of time.

FORBES: How to Spot Concealed Emotion - Body Language Quick Take #8