Trade and food security

Here is a pair of good articles on how trade and trade policies affect food security.  The first article gives a great overview of food security, while the second looks more specifically at how trade policies might affect food security positively or negatively for different social groups, different families, and different countries.  I appreciated these articles because they are even-handed and recognize the complexity of the food security-trade nexus, as opposed to simple boosterism in favor of increased trade liberalization.